There was no problem. I was able to deploy seam pojo application on tomcat 6 using toplink. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4125612#4125612 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4125612