solved it out! first of all, I decided to reinstall JBoss, because it kept giving me that error which I didn't know where was coming from and that didn't make me happy. So basically the jboss.xml should had <resource-name>java:savingsExampleDS</resource-name> instead <resource-name>savingsExampleDS</resource-name> that's why it was keeping point to the default. http://wiki.jboss.org/wiki/Wiki.jsp?page=HowDoICreateAResourceRef View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4017690#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...