DOMINO 8.5 and Remote DB2 v9.1 configuration

I installed Domino 8.5, db2 access server & DB2 v9 in same server , it is working well but when i installed Domino,Db2 Run Time Client in ServerA and DB2 installed ServerB(Remote) then DB2 not enable on the Server A .Error :- server A not able to find db2 server

Plz tell me the process or configuration of that .