That means I should keep hsql-ds.xml, remove portal-hsql-ds.xml. and then add mysql-ds.xml?? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4136986#4136986 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4136986