hi all, i found solution (and i apologize for not being more proactive..) i have downloaded ejb3.0-rc9fd and haveupdated followign files: - ejb3-persistence.jar - jboss-ejb3-client.jar - ejb3.deployer (directory) - jboss-aop-jdk50.deployer (directory) in jbossAS 4.0.4GA. all files above comes with ejb3.0-rc9fd or with microcontainer rc9 hth marco View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3989775#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...