This is probably because the messages aren't serializable.
It would be a fairly simple matter to make them serializable.
Madhu- can you add this in JIRA against 1.4.0.CR1?
View the original post :
http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4049491#...
Reply to the post :
http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...