Connect /@SID hangs

Dear Team,
Dispatcher show yellow--ABAP processes all in RUN status and tried connecting to oracle conn /@SD2 it hangs.
Not able to find as why the oracle hangs and that is the reason as why the logs dev_w0 does not show anything.
Any idea guys??
dev_disp
trc file: "dev_disp", trc level: 1, release: "700"
sysno      00
sid        SD2
systemid   562 (PC with Windows NT)
relno      7000
patchlevel 0
patchno    185
intno      20050900
make:      multithreaded, Unicode, 64 bit, optimized
pid        12124
Tue Sep 15 19:07:14 2009
kernel runs with dp version 241000(ext=110000) (@(#) DPLIB-INT-VERSION-241000-UC)
length of sys_adm_ext is 576 bytes
SWITCH TRC-HIDE on ***
***LOG Q00=> DpSapEnvInit, DPStart (00 12124) [dpxxdisp.c   1285]
     shared lib "dw_xml.dll" version 185 successfully loaded
     shared lib "dw_xtc.dll" version 185 successfully loaded
     shared lib "dw_stl.dll" version 185 successfully loaded
     shared lib "dw_gui.dll" version 185 successfully loaded
     shared lib "dw_mdm.dll" version 185 successfully loaded
rdisp/softcancel_sequence :  -> 0,5,-1
use internal message server connection to port 3900
Tue Sep 15 19:07:19 2009
WARNING => DpNetCheck: NiAddrToHost(1.0.0.0) took 5 seconds
***LOG GZZ=> 1 possible network problems detected - check tracefile and adjust the DNS settings [dpxxtool2.c  5418]
MtxInit: 30000 0 0
DpSysAdmExtInit: ABAP is active
DpSysAdmExtInit: VMC (JAVA VM in WP) is not active
DpIPCInit2: start server >MB1ES1018_SD2_00                        <
DpShMCreate: sizeof(wp_adm)          19280     (1752)
DpShMCreate: sizeof(tm_adm)          5912704     (29416)
DpShMCreate: sizeof(wp_ca_adm)          24064     (80)
DpShMCreate: sizeof(appc_ca_adm)     8000     (80)
DpCommTableSize: max/headSize/ftSize/tableSize=500/16/552064/552080
DpShMCreate: sizeof(comm_adm)          552080     (1088)
DpSlockTableSize: max/headSize/ftSize/fiSize/tableSize=0/0/0/0/0
DpShMCreate: sizeof(slock_adm)          0     (104)
DpFileTableSize: max/headSize/ftSize/tableSize=0/0/0/0
DpShMCreate: sizeof(file_adm)          0     (72)
DpShMCreate: sizeof(vmc_adm)          0     (1864)
DpShMCreate: sizeof(wall_adm)          (41664/36752/64/192)
DpShMCreate: sizeof(gw_adm)     48
DpShMCreate: SHM_DP_ADM_KEY          (addr: 000000000F0B0050, size: 6603504)
DpShMCreate: allocated sys_adm at 000000000F0B0050
DpShMCreate: allocated wp_adm at 000000000F0B21F0
DpShMCreate: allocated tm_adm_list at 000000000F0B6D40
DpShMCreate: allocated tm_adm at 000000000F0B6DA0
DpShMCreate: allocated wp_ca_adm at 000000000F65A620
DpShMCreate: allocated appc_ca_adm at 000000000F660420
DpShMCreate: allocated comm_adm at 000000000F662360
DpShMCreate: system runs without slock table
DpShMCreate: system runs without file table
DpShMCreate: allocated vmc_adm_list at 000000000F6E8FF0
DpShMCreate: allocated gw_adm at 000000000F6E9070
DpShMCreate: system runs without vmc_adm
DpShMCreate: allocated ca_info at 000000000F6E90A0
DpShMCreate: allocated wall_adm at 000000000F6E90B0
MBUF state OFF
DpCommInitTable: init table for 500 entries
rdisp/queue_size_check_value :  -> off
ThTaskStatus: rdisp/reset_online_during_debug 0
EmInit: MmSetImplementation( 2 ).
MM global diagnostic options set: 0
<ES> client 0 initializing ....
<ES> InitFreeList
<ES> block size is 4096 kByte.
Using implementation view
<EsNT> Using memory model view.
<EsNT> Memory Reset disabled as NT default
<ES> 511 blocks reserved for free list.
ES initialized.
mm.dump: set maximum dump mem to 96 MB
J2EE server info
  start = TRUE
  state = STARTED
  pid = 17500
  argv[0] = E:\usr\sap\SD2\DVEBMGS00\exe\jcontrol.EXE
  argv[1] = E:\usr\sap\SD2\DVEBMGS00\exe\jcontrol.EXE
  argv[2] = pf=E:\usr\sap\SD2\SYS\profile\SD2_DVEBMGS00_MB1ES1018
  argv[3] = -DSAPSTART=1
  argv[4] = -DCONNECT_PORT=64999
  argv[5] = -DSAPSYSTEM=00
  argv[6] = -DSAPSYSTEMNAME=SD2
  argv[7] = -DSAPMYNAME=MB1ES1018_SD2_00
  argv[8] = -DSAPPROFILE=E:\usr\sap\SD2\SYS\profile\SD2_DVEBMGS00_MB1ES1018
  argv[9] = -DFRFC_FALLBACK=ON
  argv[10] = -DFRFC_FALLBACK_HOST=localhost
  start_lazy = 0
  start_control = SAP J2EE startup framework
DpJ2eeStart: j2ee state = STARTED
rdisp/http_min_wait_dia_wp : 1 -> 1
***LOG CPS=> DpLoopInit, ICU ( 3.0 3.0 4.0.1) [dpxxdisp.c   1692]
***LOG Q0K=> DpMsAttach, mscon ( MB1ES1018) [dpxxdisp.c   12429]
DpStartStopMsg: send start message (myname is >MB1ES1018_SD2_00                        <)
DpStartStopMsg: start msg sent
CCMS: AlInitGlobals : alert/use_sema_lock = TRUE.
CCMS: Initalizing shared memory of size 60000000 for monitoring segment.
CCMS: Checking Downtime Configuration of Monitoring Segment.
CCMS: start to initalize 3.X shared alert area (first segment).
DpJ2eeLogin: j2ee state = CONNECTED
DpMsgAdmin: Set release to 7000, patchlevel 0
MBUF state PREPARED
MBUF component UP
DpMBufHwIdSet: set Hardware-ID
***LOG Q1C=> DpMBufHwIdSet [dpxxmbuf.c   1050]
DpMsgAdmin: Set patchno for this platform to 185
Release check o.K.
dev_w0
trc file: "dev_w0", trc level: 1, release: "700"
ACTIVE TRACE LEVEL           1
ACTIVE TRACE COMPONENTS      all, MJ
B 
B Tue Sep 15 19:07:19 2009
B  create_con (con_name=R/3)
B  Loading DB library 'E:\usr\sap\SD2\DVEBMGS00\exe\dboraslib.dll' ...
B  Library 'E:\usr\sap\SD2\DVEBMGS00\exe\dboraslib.dll' loaded
B  Version of 'E:\usr\sap\SD2\DVEBMGS00\exe\dboraslib.dll' is "700.08", patchlevel (0.167)
B  New connection 0 created
M sysno      00
M sid        SD2
M systemid   562 (PC with Windows NT)
M relno      7000
M patchlevel 0
M patchno    185
M intno      20050900
M make:      multithreaded, Unicode, 64 bit, optimized
M pid        12428
M
M  kernel runs with dp version 241000(ext=110000) (@(#) DPLIB-INT-VERSION-241000-UC)
M  length of sys_adm_ext is 576 bytes
M  ***LOG Q0Q=> tskh_init, WPStart (Workproc 0 12428) [dpxxdisp.c   1347]
I  MtxInit: 30000 0 0
M  DpSysAdmExtCreate: ABAP is active
M  DpSysAdmExtCreate: VMC (JAVA VM in WP) is not active
M  DpShMCreate: sizeof(wp_adm)          19280     (1752)
M  DpShMCreate: sizeof(tm_adm)          5912704     (29416)
M  DpShMCreate: sizeof(wp_ca_adm)          24064     (80)
M  DpShMCreate: sizeof(appc_ca_adm)     8000     (80)
M  DpCommTableSize: max/headSize/ftSize/tableSize=500/16/552064/552080
M  DpShMCreate: sizeof(comm_adm)          552080     (1088)
M  DpSlockTableSize: max/headSize/ftSize/fiSize/tableSize=0/0/0/0/0
M  DpShMCreate: sizeof(slock_adm)          0     (104)
M  DpFileTableSize: max/headSize/ftSize/tableSize=0/0/0/0
M  DpShMCreate: sizeof(file_adm)          0     (72)
M  DpShMCreate: sizeof(vmc_adm)          0     (1864)
M  DpShMCreate: sizeof(wall_adm)          (41664/36752/64/192)
M  DpShMCreate: sizeof(gw_adm)     48
M  DpShMCreate: SHM_DP_ADM_KEY          (addr: 00000000110B0050, size: 6603504)
M  DpShMCreate: allocated sys_adm at 00000000110B0050
M  DpShMCreate: allocated wp_adm at 00000000110B21F0
M  DpShMCreate: allocated tm_adm_list at 00000000110B6D40
M  DpShMCreate: allocated tm_adm at 00000000110B6DA0
M  DpShMCreate: allocated wp_ca_adm at 000000001165A620
M  DpShMCreate: allocated appc_ca_adm at 0000000011660420
M  DpShMCreate: allocated comm_adm at 0000000011662360
M  DpShMCreate: system runs without slock table
M  DpShMCreate: system runs without file table
M  DpShMCreate: allocated vmc_adm_list at 00000000116E8FF0
M  DpShMCreate: allocated gw_adm at 00000000116E9070
M  DpShMCreate: system runs without vmc_adm
M  DpShMCreate: allocated ca_info at 00000000116E90A0
M  DpShMCreate: allocated wall_adm at 00000000116E90B0
M  rdisp/queue_size_check_value :  -> off
M  ThTaskStatus: rdisp/reset_online_during_debug 0
X  EmInit: MmSetImplementation( 2 ).
X  MM global diagnostic options set: 0
X  <ES> client 0 initializing ....
X  Using implementation view
X  <EsNT> Using memory model view.
M  <EsNT> Memory Reset disabled as NT default
X  ES initialized.
X  mm.dump: set maximum dump mem to 96 MB
M  ThInit: running on host MB1ES1018
M  calling db_connect ...
C  Prepending E:\usr\sap\SD2\DVEBMGS00\exe to Path.
C  Oracle Client Version: '10.2.0.2.0'
C  Client NLS settings: AMERICAN_AMERICA.UTF8
C  Logon as OPS$-user to get SAPSR3's password
C  Connecting as /@SD2 on connection 0 (nls_hdl 0) ... (dbsl 700 030508)
C  Nls CharacterSet                 NationalCharSet              C      EnvHp      ErrHp ErrHpBatch
C    0 UTF8                                                      1 000000000ADD90C0 000000000ADE12F0 000000000ADFDB18
C  Attaching to DB Server SD2 (con_hdl=0,svchp=000000000ADFD9D8,srvhp=000000000ADFFE08)
Regards

The output of the trace
Dump file h:\oracle\sd2\saptrace\usertrace\sd2_ora_6884.trc
Wed Sep 16 18:23:27 2009
ORACLE V10.2.0.2.0 - 64bit Production vsnsta=0
vsnsql=14 vsnxtr=3
Oracle Database 10g Enterprise Edition Release 10.2.0.2.0 - 64bit Production
With the Partitioning, OLAP and Data Mining options
Windows Server 2003 Version V5.2 Service Pack 2
CPU                 : 8 - type 8664, 2 Physical Cores
Process Affinity    : 0x0000000000000000
Memory (Avail/Total): Ph:28518M/32762M, Ph+PgF:110650M/133853M
Instance name: sd2
Redo thread mounted by this instance: 1
Oracle process number: 21
Windows thread id: 6884, image: ORACLE.EXE (SHAD)
opiino: Attach failed! error=-1 ifvp=0000000000000000*
Dump file h:\oracle\sd2\saptrace\usertrace\sd2_ora_6884.trc
Wed Sep 16 19:02:46 2009
ORACLE V10.2.0.2.0 - 64bit Production vsnsta=0
vsnsql=14 vsnxtr=3
Oracle Database 10g Enterprise Edition Release 10.2.0.2.0 - 64bit Production
With the Partitioning, OLAP and Data Mining options
Windows Server 2003 Version V5.2 Service Pack 2
CPU                 : 8 - type 8664, 2 Physical Cores
Process Affinity    : 0x0000000000000000
Memory (Avail/Total): Ph:29124M/32762M, Ph+PgF:114263M/133853M
Instance name: sd2
Redo thread mounted by this instance: 1
Oracle process number: 13
Windows thread id: 6884, image: ORACLE.EXE (SHAD)
SERVICE NAME:(SYS$USERS) 2009-09-16 19:02:46.367
SESSION ID:(85.3) 2009-09-16 19:02:46.367
tkcrrsarc: (WARN) Failed to find ARCH for message (message:0x1)*
tkcrrpa: (WARN) Failed initial attempt to send ARCH message (message:0x1)
LISTENER  output*
LSNRCTL> status
Connecting to (ADDRESS=(PROTOCOL=IPC)(KEY=SD2.WORLD))
STATUS of the LISTENER
Alias                     LISTENER
Version                   TNSLSNR for 64-bit Windows: Version 10.2.0.2.0 - Produ
ction
Start Date                16-SEP-2009 16:24:05
Uptime                    0 days 2 hr. 40 min. 9 sec
Trace Level               support
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   f:\oracle\SD2\102\network\admin\listener.ora
Listener Log File         f:\oracle\SD2\102\network\log\listener.log
Listener Trace File       f:\oracle\SD2\102\network\trace\listener.trc
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=
.\pipe\SD2.WORLDipc)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=
.\pipe\SD2ipc)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=MB1ES1018)(PORT=1527)))
Services Summary...
Service "SD2" has 1 instance(s).
  Instance "SD2", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully
SQL> select username, account_status from dba_users;
USERNAME                       ACCOUNT_STATUS
OPS$MB1ES1018\SAPSERVICESR3    OPEN
OPS$MB1ES1018\SD2ADM           OPEN
OPS$MB1ES1018\SAPSERVICESD2    OPEN
SYS                            OPEN
SYSTEM                         OPEN
SAPSR3                         OPEN
SAPSR3DB                       OPEN
OUTLN                          LOCKED
TSMSYS                         EXPIRED & LOCKED
DIP                            EXPIRED & LOCKED
DBSNMP                         EXPIRED & LOCKED
11 rows selected.
SQL> conn SAPSR3/sap@SD2
ERROR:
ORA-03113: end-of-file on communication channel
SQL> conn /@SD2 hangs
Is there something to do with the user *OPS$MB1ES1018\SD2ADM *. I have changed its password to windows login of sd2adm and also to sap, but no luck..
Any help would be appreciated.
Regards

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    12263: door_call(7, 0xFFFFFD7FFFDF2B30) = 0
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    12263: getpid() = 12263 [12240]
    12263: brk(0x0663CC20) = 0
    12263: brk(0x06648C20) = 0
    12263: brk(0x06648C20) = 0
    12263: brk(0x0664CC20) = 0
    12263: brk(0x0664CC20) = 0
    12263: brk(0x06650C20) = 0
    12263: so_socket(PF_INET, SOCK_DGRAM, IPPROTO_IP, "", SOV_DEFAULT) = 21
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    12263: getsockname(21, 0xFFFFFD7FFFDF67D0, 0xFFFFFD7FFFDF6810, SOV_DEFAULT) = 0
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    12263: write(22, " 4\0\0\001\002\001010101".., 52) = 52
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    12263: lwp_sigmask(SIG_SETMASK, 0x9FBED057, 0x0000FFF7) = 0xFFBFFEFF [0x0000FFFF]
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    12240: lwp_sigmask(SIG_SETMASK, 0x9FBEF057, 0x0000FFF7) = 0xFFBFFEFF [0x0000FFFF]
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    12240: lwp_sigmask(SIG_SETMASK, 0x9FBEF057, 0x0000FFF7) = 0xFFBFFEFF [0x0000FFFF]
    12240: lwp_sigmask(SIG_SETMASK, 0x9FBEF057, 0x0000FFF7) = 0xFFBFFEFF [0x0000FFFF]
    12240: setcontext(0xFFFFFD7FFFDD8410)
    12240: Received signal #2, SIGINT, in read() [caught]
    12240: read(12, 0x012F1056, 2064) Err#91 ERESTART
    12240: lwp_sigmask(SIG_SETMASK, 0x9FBEF057, 0x0000FFF7) = 0xFFBFFEFF [0x0000FFFF]
    12240: lwp_sigmask(SIG_SETMASK, 0x9FBEF057, 0x0000FFF7) = 0xFFBFFEFF [0x0000FFFF]
    12240: lwp_sigmask(SIG_SETMASK, 0x9FBEF057, 0x0000FFF7) = 0xFFBFFEFF [0x0000FFFF]
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    12240: read(12, 0x012F1056, 2064) (sleeping...)

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