Thankz for the reply. I have change the name from DefaultDS to MySqlDs. I only have one error right now the error is : | --- MBEANS THAT ARE THE ROOT CAUSE OF THE PROBLEM --- | ObjectName: jboss.jca:service=DataSourceBinding,name=DefaultDS | State: NOTYETINSTALLED | Depends On Me: | jboss.ejb:service=EJBTimerService,persistencePolicy=database | jboss.mq:service=PersistenceManager What specific XML file should I change the Data Source? Thankz :) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3978070#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...