Hy out there, Just wanted to reply that I found the Problem. It wasn't a problem with JBP 2.7.2. I had another Server with JBP 2.6.6 running in the same Subnet, so the Caches of the Servers wanted to synchronise each other. And the Exceptions i saw were not from JBP 2.7.2, they were from the other Server which (actualy logical) didn't found the classes to load. Regards Soon5 View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4236547#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...