JARs in WEB-INF/lib are not visible to classes in the EAR. JARs in the EAR file are not automatically added to the EARs classpath. (I consider this a deficiency in the Java EE specs) Look at application.xml to see the easiest hack for referencing JAR files at the root of the EAR. (it's how we typically make seam and it's supporting libraries visible to the app) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3998739#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...