You're in the wrong forum, but it looks like your bean is making reference to javax.xml.bind.Unmarshaller without this class being available anonymous wrote : | Caused by: java.lang.NoClassDefFoundError: javax/xml/bind/Unmarshaller | 12:24:33,734 INFO [STDOUT] at java.lang.Class.newInstance(I)Ljava.lang.Object;(Unknown Source) | 12:24:33,766 INFO [STDOUT] at org.jboss.ejb.Container.createBeanClassInstance(Container.java:586) | 12:24:33,812 INFO [STDOUT] at org.jboss.ejb.plugins.AbstractInstancePool.get(AbstractInstancePool.ja | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3980678#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...