you need to drop 4.0.2 as it does not support complex data types. 4.0.3SP1 works. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4031212#4031212 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4031212