Sorry, tried again. I have followed the advise, but still having the problem in the first post. My entities are bound to both datasources. I do not have a clue what i have missed:-( anonymous wrote : bind my entities using the @PersistenceUnits annotation Perhaps this is the key. But in which way i must anotate my entities? Ciao, Carsten View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4036779#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...