Oops my bad i think this is because I was testing out 1.5.3 and decided I wasn't ready to use it but forgot to replace the pluggable-instumentor.jar with the old 1.5.2 version so i was using 1.5.2 libraries with 1.5.3 instumentor... Kabir do you think this would cause such an error? (not that i think I should be allowed to do such a thing :-) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4008339#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...