Since there is <fileset id="ejb3.lib" dir="lib"> | <include name="jboss-seam.jar" /> | </fileset> in the <!--- EJB3 ---> section in your build.xml, I suppose there would be something like <module> | <java>jboss-seam.jar</java> | </module> in the application.xml. Now the question is: Is the jboss-seam.jar found by your application server when the application was deployed? If not, try to add the code list above to your application.xml. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3989245#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...