Also, just to clarify, how are you deploying your DataSource? Deploying it inside the WAR archive will cause issues. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4027725#4027725 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4027725