oracle 透明网关问题

在一台win2003上安装sqlsever 2000sp4 和gateways10g,另一台win2003上安装ORACLE10G，现在想通过透明网关在oracle的机器上查询sqlserver2000数据库中的数据。但在用下面语句查询的时候就没有任何反映
select * from t@sql2000;

下面是配置代码：
inittg4msql.ora
HS_FDS_CONNECT_INFO=SQL2000.MESSQL
HS_FDS_TRACE_LEVEL=OFF
HS_FDS_RECOVERY_ACCOUNT=RECOVER
HS_FDS_RECOVERY_PWD=RECOVER

listener.ora
SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = tg4msql)
      (ORACLE_HOME = C:\oracle\product\10.2.0\tg_1)
      (PROGRAM = tg4msql)
    )
  )
LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
      (ADDRESS = (PROTOCOL = TCP)(HOST = sql2000)(PORT = 1521))
    )
  )

tnsnames.ora
SQL2000 =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(PORT=1521)(HOST=10.190.102.88))
    (CONNECT_DATA =
      (SID=tg4msql)
    )
    (HS=OK)
  )

建立database link
create database link sql2000 connect to mes identified by mes using 'sql2000'

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怎么没有人回啊！