"Have you configured your applications for classloader scoping (using jboss-app.xml)? " According to the wiki I thought all I had to do was to turn on the callByValue setting in the jboss-service.xml. Do I also need to make the suggested changes to the jboss-app.xml? Can you provide more details about the packaging of both your application? Specifically, is that NexusEventDefinition interface (and other bean interfaces) packaged in both the EARs? NexusEventDefinition is a POJO with and @Entity annotation. The method on my session bean returns this pojo. I do not have an interface for it. Should I create an interface and modify the Session bean to return the interface instead of the class? The packaging is as follows. 1. I have two ear projects: NexusEvents.ear and KeyB.ear. 2. I have a message driven bean in the KeyB.ear that I want to be able to call a session bean deployed in the NexusEvents.ear to return an instance of NexusEventDefinition. 3. I have exported the session bean interface and the NexusEventDefinition class out of my NexusEvents project into a jar named nexusevents.jar and have deployed it with the KeyB.ear. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4163899#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...