Please provide more details as to when are you seeing this exception. What is the code that you are using to do the lookup. The Context.PROVIDER_URL should be: jnp://localhost:1099 assuming that the EJB is deployed on the local machine. If you are using jndi.propeties then it should contain: java.naming.factory.initial=org.jnp.interfaces.NamingContextFactory | java.naming.factory.url.pkgs=org.jboss.naming:org.jnp.interfaces | java.naming.provider.url=jnp://localhost:1099 View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3974805#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...