ORA-12546: TNS:permission denied

Hi Friends,
I have just downloaded Oracle 11.2 XE on my Windows 8.1 X64. I have run the setup.exe and completed the installation.
Now, when I tried connecting to the db in SQL command line, I am getting the following error:
ORA-12546: TNS:permission denied
I have started database as well before getting into command line.
Could any one help me solving this problem?
Thanks in advance

Hi
Thanks for the response.
My OS is windows 8.1 (64 bit).  I installed Oracle XE 11.2.
In my SQL prompt I used connect command.
SQL> connect SYS/tiger
ERROR:
ORA-12546: TNS:permission denied
and
SQL> connect
Enter user-name: SYSTEM
Enter password:
ERROR:
ORA-12546: TNS:permission denied
I tried user name of the computer, SYSTEM, SYSMAN. And every time I get the same result.

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    [18-MAY-2011 14:34:26:168] nauss_set_state: entry
    [18-MAY-2011 14:34:26:168] nauss_set_state: exit
    [18-MAY-2011 14:34:26:168] naugcp_get_connect_parameters: exit
    [18-MAY-2011 14:34:26:168] nau_gettab: entry
    [18-MAY-2011 14:34:26:168] nau_gettab: exit
    [18-MAY-2011 14:34:26:168] nau_sini: entry
    [18-MAY-2011 14:34:26:168] nau_sini: exit
    [18-MAY-2011 14:34:26:168] nau_ini: exit
    [18-MAY-2011 14:34:26:168] naeeinit: entry
    [18-MAY-2011 14:34:26:168] nam_gbp: Reading parameter "SQLNET.FIPS_140" from parameter file
    [18-MAY-2011 14:34:26:168] nam_gbp: Parameter not found
    [18-MAY-2011 14:34:26:168] nam_gnsp: Reading parameter "SQLNET.ENCRYPTION_SERVER" from parameter file
    [18-MAY-2011 14:34:26:168] nam_gnsp: Parameter not found
    [18-MAY-2011 14:34:26:168] naequad: Using default value "ACCEPTED"
    [18-MAY-2011 14:34:26:168] nam_gic: entry
    [18-MAY-2011 14:34:26:168] nam_gic: Counting # of items in "SQLNET.ENCRYPTION_TYPES_SERVER" parameter
    [18-MAY-2011 14:34:26:168] nam_gic: Parameter not found
    [18-MAY-2011 14:34:26:168] nam_gic: exit
    [18-MAY-2011 14:34:26:168] naesno: Using default value "all available algorithms"
    [18-MAY-2011 14:34:26:168] naeshow: entry
    [18-MAY-2011 14:34:26:168] naeshow: exit
    [18-MAY-2011 14:34:26:168] naeeinit: exit
    [18-MAY-2011 14:34:26:168] naecinit: entry
    [18-MAY-2011 14:34:26:169] nam_gnsp: Reading parameter "SQLNET.CRYPTO_CHECKSUM_SERVER" from parameter file
    [18-MAY-2011 14:34:26:169] nam_gnsp: Parameter not found
    [18-MAY-2011 14:34:26:169] naequad: Using default value "ACCEPTED"
    [18-MAY-2011 14:34:26:169] nam_gic: entry
    [18-MAY-2011 14:34:26:169] nam_gic: Counting # of items in "SQLNET.CRYPTO_CHECKSUM_TYPES_SERVER" parameter
    [18-MAY-2011 14:34:26:169] nam_gic: Parameter not found
    [18-MAY-2011 14:34:26:169] nam_gic: exit
    [18-MAY-2011 14:34:26:169] naesno: Using default value "all available algorithms"
    [18-MAY-2011 14:34:26:169] naeshow: entry
    [18-MAY-2011 14:34:26:169] naeshow: exit
    [18-MAY-2011 14:34:26:169] naecinit: exit
    [18-MAY-2011 14:34:26:169] nadisc: entry
    [18-MAY-2011 14:34:26:169] nacomtm: entry
    [18-MAY-2011 14:34:26:169] nacompd: entry
    [18-MAY-2011 14:34:26:169] nacompd: exit
    [18-MAY-2011 14:34:26:169] nacompd: entry
    [18-MAY-2011 14:34:26:169] nacompd: exit
    [18-MAY-2011 14:34:26:169] nacomtm: exit
    [18-MAY-2011 14:34:26:169] nas_dis: entry
    [18-MAY-2011 14:34:26:169] nas_dis: exit
    [18-MAY-2011 14:34:26:169] nau_dis: entry
    [18-MAY-2011 14:34:26:169] nau_dis: exit
    [18-MAY-2011 14:34:26:169] naeetrm: entry
    [18-MAY-2011 14:34:26:169] naeetrm: exit
    [18-MAY-2011 14:34:26:169] naectrm: entry
    [18-MAY-2011 14:34:26:169] naectrm: exit
    [18-MAY-2011 14:34:26:169] nagbltrm: entry
    [18-MAY-2011 14:34:26:169] nau_gtm: entry
    [18-MAY-2011 14:34:26:169] nau_gtm: exit
    [18-MAY-2011 14:34:26:169] nagbltrm: exit
    [18-MAY-2011 14:34:26:169] nadisc: exit
    [18-MAY-2011 14:34:26:169] nainit: exit
    [18-MAY-2011 14:34:26:169] nsnainit: NS Connection version: 313
    [18-MAY-2011 14:34:26:169] nsnainit: inf->nsinfflg[0]: 0xd inf->nsinfflg[1]: 0xd
    [18-MAY-2011 14:34:26:169] nsnainit: "or" info flags: 0xd Translations follow:
    native service(s) is (are) wanted
    NA disabled remotely for this connection
    NA services unavailable on both processes - negotiation not needed
    [18-MAY-2011 14:34:26:169] nsnainit: "or" info flags: 0xd Translations follow:
    native service(s) is (are) wanted
    NA disabled remotely for this connection
    NA services unavailable on both processes - negotiation not needed
    "and" info flags: 0xd Translations follow:
    native service(s) is (are) wanted
    NA disabled remotely for this connection
    NA services unavailable on both processes - negotiation not needed
    [18-MAY-2011 14:34:26:169] nsopen: global context check-in (to slot 0) complete
    [18-MAY-2011 14:34:26:169] nsopen: lcl[0]=0xf4ffe9ff, lcl[1]=0x10000000, gbl[0]=0x7ebf, gbl[1]=0x0, tdu=4096, sdu=2048
    [18-MAY-2011 14:34:26:169] nsdo: cid=0, opcode=65, bl=0, what=0, uflgs=0x0, cflgs=0x2
    [18-MAY-2011 14:34:26:169] nsdo: rank=64, nsctxrnk=0
    [18-MAY-2011 14:34:26:169] nsdo: nsctx: state=7, flg=0x4000, mvd=0
    [18-MAY-2011 14:34:26:169] nsmal: 168 bytes at 0x80c1760
    [18-MAY-2011 14:34:26:169] nsmal: 168 bytes at 0x80c2030
    [18-MAY-2011 14:34:26:169] nsdo: nsctxrnk=0
    [18-MAY-2011 14:34:26:169] nsdo: cid=0, opcode=68, bl=0, what=8, uflgs=0x0, cflgs=0x3
    [18-MAY-2011 14:34:26:169] nsdo: rank=64, nsctxrnk=0
    [18-MAY-2011 14:34:26:169] nsdo: nsctx: state=14, flg=0x4004, mvd=0
    [18-MAY-2011 14:34:26:169] nsdo: gtn=10, gtc=10, ptn=10, ptc=2047
    [18-MAY-2011 14:34:26:169] nscon: doing connect handshake...
    [18-MAY-2011 14:34:26:169] nscon: recving a packet
    [18-MAY-2011 14:34:26:169] nsprecv: reading from transport...
    [18-MAY-2011 14:34:26:169] ntprd: entry
    [18-MAY-2011 14:34:26:169] ntprd: exit
    [18-MAY-2011 14:34:26:169] nsprecv: 188 bytes from transport
    [18-MAY-2011 14:34:26:169] nsprecv: tlen=188, plen=188, type=1
    [18-MAY-2011 14:34:26:169] nscon: got NSPTCN packet
    [18-MAY-2011 14:34:26:169] nsconneg: vsn=313, lov=300, opt=0x0, sdu=2048, tdu=4096, ntc=0x4f98
    [18-MAY-2011 14:34:26:169] nsconneg: vsn=313, gbl=0x0, sdu=2048, tdu=4096
    [18-MAY-2011 14:34:26:169] nsmal: 130 bytes at 0x80c2900
    [18-MAY-2011 14:34:26:169] nscon: got 130 bytes connect data
    [18-MAY-2011 14:34:26:169] nsmfr: 130 bytes at 0x80c2900
    [18-MAY-2011 14:34:26:169] nscon: discarding connect data (130 bytes)
    [18-MAY-2011 14:34:26:169] nsdo: nsctxrnk=0
    [18-MAY-2011 14:34:26:169] nsinh_hoff: connection inherited
    [18-MAY-2011 14:34:26:169] nsinherit: connected
    [18-MAY-2011 14:34:26:169] nsglma: entry
    [18-MAY-2011 14:34:26:170] nsglma: Listener's pid=10501
    [18-MAY-2011 14:34:26:170] nladini: entry
    [18-MAY-2011 14:34:26:170] nladini: exit
    [18-MAY-2011 14:34:26:170] nladget: entry
    [18-MAY-2011 14:34:26:170] nladget: exit
    [18-MAY-2011 14:34:26:170] nsgllsn: LSNDSC==>(DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1)))
    [18-MAY-2011 14:34:26:170] nsglhcrt: entry
    [18-MAY-2011 14:34:26:171] nsglhcrt: exit
    [18-MAY-2011 14:34:26:171] nsglbgetRSPidx: entry
    [18-MAY-2011 14:34:26:171] nladini: entry
    [18-MAY-2011 14:34:26:171] nladini: exit
    [18-MAY-2011 14:34:26:171] nladget: entry
    [18-MAY-2011 14:34:26:171] nladget: exit
    [18-MAY-2011 14:34:26:171] nsglbn2i: entry
    [18-MAY-2011 14:34:26:171] nsglbn2i: exit
    [18-MAY-2011 14:34:26:171] nladtrm: entry
    [18-MAY-2011 14:34:26:171] nladtrm: exit
    [18-MAY-2011 14:34:26:171] nsglbgetRSPidx: returning ecode=0
    [18-MAY-2011 14:34:26:171] nsglbgetRSPidx: exit
    [18-MAY-2011 14:34:26:171] nsc2addr: (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1)))
    [18-MAY-2011 14:34:26:171] sntuscrt: entry
    [18-MAY-2011 14:34:26:171] sntuscrt: exit
    [18-MAY-2011 14:34:26:171] ntusb2adr: entry
    [18-MAY-2011 14:34:26:171] ntusb2adr: KEY = EXTPROC1
    [18-MAY-2011 14:34:26:171] ntusb2adr: exit
    [18-MAY-2011 14:34:26:171] nsmal: 1144 bytes at 0x80c5850
    [18-MAY-2011 14:34:26:171] nsmal: 1992 bytes at 0x80c5cd0
    [18-MAY-2011 14:34:26:171] nsmal: 168 bytes at 0x80c5730
    [18-MAY-2011 14:34:26:171] ntusconn: entry
    [18-MAY-2011 14:34:26:171] ntusconn: connect: operation 6
    [18-MAY-2011 14:34:26:171] ntuscnp: entry
    [18-MAY-2011 14:34:26:171] ntuscnp: exit
    [18-MAY-2011 14:34:26:171] ntusconn: exit
    [18-MAY-2011 14:34:26:171] nsopen: opening transport...
    [18-MAY-2011 14:34:26:171] ntusconn: entry
    [18-MAY-2011 14:34:26:171] ntusconn: connect: operation 2
    [18-MAY-2011 14:34:26:171] ntuscnp: entry
    [18-MAY-2011 14:34:26:171] sntusgph: entry
    [18-MAY-2011 14:34:26:171] sntusgph: exit
    [18-MAY-2011 14:34:26:171] ntus2err: entry
    [18-MAY-2011 14:34:26:171] ntus2err: sd=9, op=1, resnt[0]=512, resnt[1]=98, resnt[2]=0
    [18-MAY-2011 14:34:26:171] ntus2err: exit
    [18-MAY-2011 14:34:26:171] sntusgph: entry
    [18-MAY-2011 14:34:26:171] sntusgph: fail to search /var/tmp/.oracle/sEXTPROC1
    [18-MAY-2011 14:34:26:172] sntusgph: exit
    [18-MAY-2011 14:34:26:172] ntus2err: entry
    [18-MAY-2011 14:34:26:172] ntus2err: sd=9, op=1, resnt[0]=525, resnt[1]=1, resnt[2]=0
    [18-MAY-2011 14:34:26:172] ntus2err: exit
    [18-MAY-2011 14:34:26:172] ntuscnp: exit
    [18-MAY-2011 14:34:26:172] ntusconn: exit
    [18-MAY-2011 14:34:26:172] nserror: nsres: id=0, op=65, ns=12555, ns2=12560; nt[0]=525, nt[1]=1, nt[2]=0; ora[0]=0, ora[1]=0, ora[2]=0
    [18-MAY-2011 14:34:26:172] nsopen: unable to open transport
    [18-MAY-2011 14:34:26:172] nsmfr: 1992 bytes at 0x80c5cd0
    [18-MAY-2011 14:34:26:172] nsmfr: 1144 bytes at 0x80c5850
    [18-MAY-2011 14:34:26:172] nsglhfre: entry
    [18-MAY-2011 14:34:26:172] nsglhrem: entry
    [18-MAY-2011 14:34:26:172] nsglhrem: entry
    [18-MAY-2011 14:34:26:172] nsglhfre: Deallocating cxd 0x80c43f0.
    [18-MAY-2011 14:34:26:172] nsglhfre: exit
    [18-MAY-2011 14:34:26:172] nsglma: Reporting the following error stack:
    TNS-12555: TNS:permission denied
    TNS-12560: TNS:protocol adapter error
    TNS-00525: Insufficient privilege for operation
    Linux Error: 1: Operation not permitted
    [18-MAY-2011 14:34:26:172] nsdo: cid=0, opcode=67, bl=542, what=10, uflgs=0x0, cflgs=0x3
    [18-MAY-2011 14:34:26:172] nsdo: rank=64, nsctxrnk=0
    [18-MAY-2011 14:34:26:172] nsdo: nsctx: state=2, flg=0x4004, mvd=0
    [18-MAY-2011 14:34:26:172] nsdo: gtn=188, gtc=188, ptn=10, ptc=2047
    [18-MAY-2011 14:34:26:172] nscon: sending NSPTRF packet
    [18-MAY-2011 14:34:26:172] nspsend: plen=12, type=4
    [18-MAY-2011 14:34:26:172] ntpwr: entry
    [18-MAY-2011 14:34:26:172] ntpwr: exit
    [18-MAY-2011 14:34:26:172] nspsend: 12 bytes to transport
    [18-MAY-2011 14:34:26:172] nscon: sending 542 bytes connect data
    [18-MAY-2011 14:34:26:172] nsdo: cid=0, opcode=67, bl=542, what=1, uflgs=0x4000, cflgs=0x0
    [18-MAY-2011 14:34:26:172] nsdo: nsctx: state=2, flg=0x4004, mvd=0
    [18-MAY-2011 14:34:26:172] nsdo: gtn=188, gtc=188, ptn=10, ptc=2047
    [18-MAY-2011 14:34:26:172] nsdo: 542 bytes to NS buffer
    [18-MAY-2011 14:34:26:172] nsdo: nsctxrnk=0
    [18-MAY-2011 14:34:26:172] nstimarmed: no timer allocated
    [18-MAY-2011 14:34:26:172] nstoClearTimeout: ATO disabled for ctx=0x0x80afb80
    [18-MAY-2011 14:34:26:172] nstoClearTimeout: STO disabled for ctx=0x0x80afb80
    [18-MAY-2011 14:34:26:172] nstoClearTimeout: RTO disabled for ctx=0x0x80afb80
    [18-MAY-2011 14:34:26:172] nstoClearTimeout: PITO disabled for ctx=0x0x80afb80
    [18-MAY-2011 14:34:26:172] nstoUpdateActive: Active timeout is -1 (see nstotyp)
    [18-MAY-2011 14:34:26:172] ntpctl: entry
    [18-MAY-2011 14:34:26:172] ntpctl: exit
    [18-MAY-2011 14:34:26:172] ntpctl: entry
    [18-MAY-2011 14:34:26:172] ntpctl: exit
    [18-MAY-2011 14:34:26:172] nsdo: cid=0, opcode=66, bl=0, what=0, uflgs=0x0, cflgs=0x2
    [18-MAY-2011 14:34:26:172] nsdo: rank=64, nsctxrnk=0
    [18-MAY-2011 14:34:26:172] nsdo: nsctx: state=2, flg=0x4000, mvd=0
    [18-MAY-2011 14:34:26:172] nsdofls: DATA flags: 0x40
    [18-MAY-2011 14:34:26:172] nsdofls: sending NSPTDA packet
    [18-MAY-2011 14:34:26:172] nspsend: plen=552, type=6
    [18-MAY-2011 14:34:26:172] ntpwr: entry
    [18-MAY-2011 14:34:26:172] ntpwr: exit
    [18-MAY-2011 14:34:26:172] nspsend: 552 bytes to transport
    [18-MAY-2011 14:34:26:172] nsdo: nsctxrnk=0
    [18-MAY-2011 14:34:26:172] nsclose: closing transport
    [18-MAY-2011 14:34:26:172] ntpdisc: entry
    [18-MAY-2011 14:34:26:173] ntpdisc: exit
    [18-MAY-2011 14:34:26:173] nsclose: global context check-out (from slot 0) complete
    [18-MAY-2011 14:34:26:173] nsmfr: 1992 bytes at 0x80bfd40
    [18-MAY-2011 14:34:26:173] nsmfr: 1144 bytes at 0x80afb80
    [18-MAY-2011 14:34:26:173] nsbrfr: nsbfs at 0x80c1760, data at 0x80c0740.
    [18-MAY-2011 14:34:26:173] nsbrfr: nsbfs at 0x80c2030, data at 0x80c20e0.
    [18-MAY-2011 14:34:26:173] nsbrfr: nsbfs at 0x80c0690, data at 0x80c1810.
    [18-MAY-2011 14:34:26:173] nsbrfr: nsbfs at 0x80c5730, data at 0x80c64a0.
    [18-MAY-2011 14:34:26:173] nlse_term_audit: entry
    [18-MAY-2011 14:34:26:173] nlse_term_audit: exit

    Check this thread
    Debian - TNS-12555: TNS:permission denied

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