How to create JCO in Portal 7.3.

Hello colleagues,

I need how to configure JCO in portal 7.3. When check JCO show this error,

- com.sap.mw.jco.JCO$Exception: (102) RFC_ERROR_COMMUNICATION: Connect to message server host failed Connection parameters: TYPE=B DEST=<Java Rfc client> MSHOST=host R3NAME=SID GROUP=DIALOGO PCS=1 ERROR Group DIALOGO not found TIME Thu Feb 06 00:13:19 2014 RELEASE 720 COMPONENT LG VERSION 5 RC -6 MODULE lgxx.c LINE 4577 DETAIL LgIGroupX COUNTER 2

How to create a new message server, for select other system?

Thanks.