Thanks again for your help. Here are the things that I tried: "DriverType" = 2 - still failed to load native libs "DriverType" = 2 and LD_LIBRARY_PATH set to DB_INSTANCE/lib(64)/ - SQL10007N Message "-1390" could not be retrieved. Reason code: "3" "DriverType" = 2, LD_LIBRARY_PATH set and defined DB2INSTANCE env var (source db2profile should take care of this) - XA connection established "DriverType" = 4 - JBoss starts up without DB conn errors. Eventhough last 2 options are working in theory I am getting Tx related errors esp. RollbackException, Commit errors etc, but I guess that could be just because of the underlying J2EE application. I just thought it would be helpful to those who face this issue in future. Thanks, -Shrinivas View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3989463#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...