If my understanding is correct, the mc-conf.jar file consists of the files int the jboss-seam-1.2.0/embedded-ejb/conf directory. This is shared across all Seam example applications. If this is the case, then shouldn't all examples be EJB3 enabled? I did compare the contents of my mc-conf.jar file with the one in the Seam examples and could not see any difference. This led me to think there was something in the Booking/resources directory that was different. In short, what I'm after is a simple app that uses EJB3 & MySql and can be deployed on both JBoss and Tomcat. I develop using JBoss, but unfortunately have no control over my production environment which uses Tomcat. I have not problem developing with JBoss, but have yet to enable the app to run on Tomcat. -Michael View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4025155#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...