Thanks for your time. The links are helpful. But i can not use the information directly Have to discover how to enable XA transactions in our oracle databases. One is Oracle Express (here i can not find the script initxa.sql) The other is oracle 9i :-( where i do not find either of the scripts. So my next task is to learn how to enable xa for these oracle versions. Ciao Carsten View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4065252#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...