I had interpreted Steph's message to be that he has an EJB JAR in his WEB-INF/lib directory that works fine when deployed as part of the web app but that he was then trying to deploy that same JAR separately as a stand-alone EJB module.
Perhaps I misunderstood.
[Message sent by forum member 'tjquinn' (tjquinn)]
http://forums.java.net/jive/thread.jspa?messageID=320073