求助透明网关.

dongbaogui

ORACLE DB IP:172.16.0.22
SQLSERVER 2005 IP:172.16.0.12
透明网关安装在SQLSERVER 2005服务器上，
透明网关配置文件initqcsrv.ora内容如下:
HS_FDS_CONNECT_INFO=172.16.0.12.cmqds
HS_FDS_TRACE_LEVEL=OFF
HS_FDS_RECOVERY_ACCOUNT=RECOVER
HS_FDS_RECOVERY_PWD=RECOVER
HS_FDS_TRANSACTION_MODE=COMMIT_CONFIRM
HS_FDS_TRANSACTION_LOG=HS_TRANSACTION_LOG
ORACLE监听配置listener.ora如下:

# listener.ora Network Configuration File: G:\oracle\product\10.2.0\tg_1\network\admin\listener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
  (SID_LIST =
  (SID_DESC =
  (SID_NAME = PLSExtProc)
  (ORACLE_HOME = G:\oracle\product\10.2.0\tg_1)
  (PROGRAM = extproc)
  )
  (SID_DESC =
  (SID_NAME = qcsrv)
  (ORACLE_HOME = G:\oracle\product\10.2.0\tg_1)
  (PROGRAM = tg4msql)
  )
  )

LISTENER =
  (DESCRIPTION_LIST =
  (DESCRIPTION =
  (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
  (ADDRESS = (PROTOCOL = TCP)(HOST = 172.16.0.12)(PORT = 1521))
  )
  )

ORALCE服务器连接字符tnsnames.ora如下:
oratosql=
  (DESCRIPTION =
  (ADDRESS_LIST =
  (ADDRESS = (PROTOCOL = TCP)(HOST = 172.16.0.12)(PORT = 1521))
  )
  (CONNECT_DATA =
  (SID = qcsrv)
  )
  (HS = OK)
  )
但是建立的dblink就是不通，一直处在等待状态，请各位高手帮忙看看是怎么回事，谢谢了。