Sorry for the typo, the correct text : 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. I have re-created one as "EJB3.0 project" and moved all sources there 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=4055479#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...