Thanks Brian, we are actually using oracle as the back-end so we have removed that file. My dir contents look like this: connection-factories-service.xml destinations-service.xml jboss-common-jdbc-wrapper-4.3.0.GA.jar jboss-local-jdbc-4.3.0.GA.rar messaging-service.xml META-INF ojdbc14-10.2.0.3.jar oracle-ds.xml oracle-persistence-service.xml orai18n-10.2.0.3.jar remoting-bisocket-service.xml Should this go in the oracle-persistence-service.xml? View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4209993#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...