I updated my connector j to 5.0.8 from 5.0.5 and now its working. But I would be grateful to know what went wrong. If 5.0.5 was at fault, then it might mean during those times JTA users couldn't use MySQL. I wonder how did the developers worked with JTA in jboss using connector 5.0.5. I've got to let this out, $%@#! @#$%! @#$@#!#@@!!!! I've spent 3 days just to find out that my connector j is stvp1d @#$%! that was great View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4214588#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...