ORA-28500 Oracle 11g Gateway problem

Question

Hi,
I have installed Oracle database 11g and configured Oracle Gateway 11g on Linux operating system.
I have created a database link through which i access data from SQL Server. By this below command,
select * from tablename@sqlserver; Where sqlserver is the db link.
It fetches the data but after some time connection automatically breaks and displayed below error message.
ERROR:
ORA-28500: connection from ORACLE to a non-Oracle system returned this message:
ORA-02063: preceding line from SQLSERVER
Below is the log file
SQLFetch: row: 100, column 3, bflsz: 41,  bflar: 23, (bfl: 23, mbl: 40)
SQLFetch: row: 100, column 4, bflsz: 16, bflar: -1
SQLFetch: row: 100, column 4, bflsz: 16,  bflar: SQL_NULL_DATA
SQLFetch: row: 100, column 5, bflsz: 16, bflar: 16
SQLFetch: row: 100, column 5, bflsz: 16,  bflar: 16, (bfl: 16, mbl: 16)
SQLFetch: row: 100, column 6, bflsz: 4, bflar: 2
SQLFetch: row: 100, column 6, bflsz: 4,  bflar: 2, (bfl: 2, mbl: 3)
SQLFetch: row: 100, column 7, bflsz: 2, bflar: 2
SQLFetch: row: 100, column 7, bflsz: 2,  bflar: 2, (bfl: 2, mbl: 2)
SQLFetch: row: 100, column 8, bflsz: 2, bflar: 2
SQLFetch: row: 100, column 8, bflsz: 2,  bflar: 2, (bfl: 2, mbl: 2)
SQLFetch: row: 100, column 9, bflsz: 4, bflar: 4
SQLFetch: row: 100, column 9, bflsz: 4,  bflar: 4, (bfl: 4, mbl: 4)
+100 rows fetched+
Exiting hgoftch, rc=0 at 2011/10/11-09:09:50
Entered hgoftch, cursor id 1 at 2011/10/11-09:09:50
hgoftch, line 130: Printing hoada @ 0x10b55db0
MAX:9, ACTUAL:9, BRC:100, WHT=5 (SELECT_LIST)
hoadaMOD bit-values found (0x200:TREAT_AS_CHAR)
DTY          NULL-OK  LEN  MAXBUFLEN   PR/SC  CST IND MOD NAME
+4 INTEGER N 4 4 0/ 0 0 0 0 IsrCode+
+4 INTEGER Y 4 4 0/ 0 0 0 0 ParIsrCode+
+12 VARCHAR Y 16 40 0/ 0 0 0 200 IsrName+
+91 DATE Y 0 16 0/ 0 0 -1 0 StartDate+
+91 DATE N 16 16 0/ 0 0 0 0 EndDate+
+12 VARCHAR Y 2 3 0/ 0 0 0 200 IsoCtry+
+5 SMALLINT Y 2 2 0/ 0 0 0 0 FyeMonth+
+5 SMALLINT Y 2 2 0/ 0 0 0 0 SIC+
+4 INTEGER Y 4 4 0/ 0 0 0 0 NAICS+
Entered hgopoer at 2011/10/11-09:09:56
hgopoer, line 233: got native error 104 and sqlstate 01000; message follows...
+[Oracle][ODBC SQL Server Driver][libssclient24]ConnectionRead (recv()). {01000,NativeErr = 104}[Oracle][ODBC SQL Server Driver][libssclient24]General network error. Check your network documentation. {08S01,NativeErr = 11}+
Exiting hgopoer, rc=0 at 2011/10/11-09:09:56
hgoftch, line 730: calling SQLFetch got sqlstate 01000
+0 rows fetched+
Exiting hgoftch, rc=28500 at 2011/10/11-09:09:56 with error ptr FILE:hgoftch.c LINE:730 FUNCTION:hgoftch() ID:Fetch resultset data
Waiting for urgent response.
Regards,
Rizi

Answer 1

# listener.ora Network Configuration File: /u01/app/oracle/product/11.2.0/db_1/network/admin/listener.ora
# Generated by Oracle configuration tools.
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = hostname)(PORT = 1521))
ADR_BASE_LISTENER = /u01/app/oracle
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = dg4msql)
(ORACLE_HOME = /u01/app/oracle/product/11.2.0/db_1)
(PROGRAM = dg4msql)
# sqlnet.ora Network Configuration File: /u01/app/oracle/product/11.2.0/db_1/network/admin/sqlnet.ora
# Generated by Oracle configuration tools.
NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)
ADR_BASE = /u01/app/oracle
GATEWAY Parameters
# This is a customized agent init file that contains the HS parameters
# that are needed for the Database Gateway for Microsoft SQL Server
# HS init parameters
HS_FDS_CONNECT_INFO=[]:1433//qqq
# alternate connect format is hostname/serverinstance/databasename
HS_FDS_TRACE_LEVEL=DEBUG
HS_FDS_RECOVERY_ACCOUNT=RECOVER
HS_FDS_RECOVERY_PWD=RECOVER
# custom init parameters
HS_KEEP_REMOTE_COLUMN_SIZE=LOCAL
HS_NLS_LENGTH_SEMANTICS=CHAR
HS_LANGUAGE=AMERICAN_AMERICA.WE8MSWIN1252
HS_NLS_NCHAR=UCS2