Can you please post your code, the exception stacktrace and also the JBoss and Java version you are using? Also, where are you calling the bean from? anonymous wrote : Unfortunately, whenever I pass in any object implementation I receive the same error Is this object implementation present in any of your jar files? Please provide more details about your application packaging. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4177563#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...