Please post your *-ds.xml file as well as JBoss version, driver, DB etc, etc. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4005850#4005850 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4005850