I renamed it to _ds.xml, not -ds.xml. so caused this error. I just found the naming specification. thank you! View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4108342#4108342 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4108342