anonymous wrote : I just copy them all physically in Windows Explorer to jboss.4.2.2.GA\server\default\lib. Changing anything in the server's lib folder is very risky. That folder is meant for the server's (required) jar files. If you need different versions of the same jars (like Hibernate) in your application then as i said the correct place is to package (i.e. copy) them within the application. Let's wait for someone with IDE experience to tell how this can be done from an IDE. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4228597#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...