Have you created and placed the -ds.xml file for your MySqlDS datasource in the deploy folder of the server? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4123745#4123745 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4123745