Sometimes it is not the named class that is missing, but rather some other class on which it depends. What classes does CustomerDAO depend on? Adding the "-verbose:class" JVM option to the command line (add it to JAVA_OPTS in the run scrip) will let you know what classes are being loaded and from where. This might give you a clue as to what the issue is. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4119474#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...