Thank you for attention. I have solved that , but still don't understand the reason. The project was created as "J2EE 1.4 project" in JBoss IDE and moved all sources there. I have re-created one as "EJB3.0 project" and now it works. The only difference was that "JBoss AOP 1.3 libraries" appeared in library list. In "J2EE 1.4 project" I were unable to select this library from the list of available libraries to attach. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4055477#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...