i just added the common-collections-3.2.jar and it seems to work, thank you mates. cheers, Youssef View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4222007#4222007 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4222007