Domino & Remote DB2

I am facing proble when i enable db2 (9.1) in domino( 8.5 ) . i have two server , one has db2 server and second server has Domino with db2 runtime cliet .

Error is :- DB2 Server ENABLE LOG

        Server id update completed 

SQL1019N The node name "DB2" specified in  the command is not valid  

Error attempting to catalog node.