JBoss Tools 2.* works with Eclipse 3.3.* only. Please use JBoss Tools 3.0.0.* for Eclipse 3.4.* View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4213827#4213827 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4213827