I can't enable my sap listener?

Hi all
when i enable the sap listener,i fina a error as following:
T:2624 ======> Connect from SAP gateway to RFC server failed
Connect_PM GWHOST=R3SERVER, GWSERV=sapgw00, TPNAME=ISIDS

LOCATION SAP-Gateway on host r3server / sapgw00
ERROR program ISIDS not registered

TIME Fri Sep 01 13:39:58 2006
RELEASE 620
COMPONENT SAP-Gateway
VERSION 2
RC 679
MODULE gwr3cpic.c
LINE 1594
DETAIL TP ISIDS not registered
COUNTER 8

why cause it?can anyone tell me the reason?

regards

                                                             fangyu

Hi,

Can u tell me

  1. In SAP SM59 Trasaction is gateway mentioned.
  2. If it is not there in SM59 transaction SAP listener uses the default gateway option.Leave this blank and test it.

Sree