Jco connection

Am getting the following error when trying to create jco connections. Please let me know what todo in this case.

The error displayed is..

com.sap.mw.jco.JCO$Exception: (102) RFC_ERROR_COMMUNICATION: Connect to message server host failed Connect_PM TYPE=B MSHOST=v011 GROUP=DEFAULT R3NAME=BIS MSSERV=sapmsBIS PCS=1 ERROR service '?' unknown TIME Fri Apr 21 09:20:41 2006 RELEASE 640 COMPONENT NI (network interface) VERSION 37 RC -3 COUNTER 1

does it have anything to do with SLD?

how do i know whether SLD has been configured or not assuming that i have access only to portal. I assume it is not possible to know this since SLD has to be configured in WAS and the EP cannot contain this information.

Thanking in advance

sammer