If you look at the release dates, 5.0 beta 2 came out in April while 4.2.1 came out in July. A lot of changes in EJB3 went into 4.2.1 that do not appear in 5.0 beta 2 (and if I recall correctly, this was one of them). According to the rumors I have heard, 5.0 beta 3 should be out around the end of this month, wait until then before using it. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4082218#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...