When I use jnp - everything is fine, no ClassCastException when accessing the eJB I deployed on Jboss 4.01. However, when I set up the bean to use iiop (updating the jboss.xml and deploying on the server config all), I get a ClassCastException on the PortableRemoteObject.narrow method. I have my EJB deployed on JBoss 4.01. I can a WEB Application running inside Jdeveloper on OC4J application server. I don't think that my remote EJB is deployed on the OC4J. I have read the wiki on ClassCastException. Here is my dump from the JMX console com.infomanager.ejb.userindex.UserIndexBean Information Repository cache version: com.infomanager.ejb.userindex.UserIndexBean(1e84ff1).ClassLoader=org.jboss.mx.loading.UnifiedClassLoader3@945d2d{ url=file:/C:/Development/jboss-4.0.2/server/all/tmp/deploy/tmp43145UserIndexEAR.ear ,addedOrder=39} ..org.jboss.mx.loading.UnifiedClassLoader3@945d2d{ url=file:/C:/Development/jboss-4.0.2/server/all/tmp/deploy/tmp43145UserIndexEAR.ear ,addedOrder=39} ....file:/C:/Development/jboss-4.0.2/server/all/tmp/deploy/tmp43145UserIndexEAR.ear ....file:/C:/Development/jboss-4.0.2/server/all/tmp/deploy/tmp43145UserIndexEAR.ear-contents/UserIndexEJB.jar ....file:/C:/Development/jboss-4.0.2/server/all/tmp/deploy/tmp43145UserIndexEAR.ear-contents/RazorSourceCommon.jar ....file:/C:/Development/jboss-4.0.2/server/all/tmp/deploy/tmp43145UserIndexEAR.ear-contents/WebAdviser.jar ....file:/C:/Development/jboss-4.0.2/server/all/tmp/deploy/tmp43145UserIndexEAR.ear-contents/jt400.jar ..org.jboss.system.server.NoAnnotationURLClassLoader@1f6f296 ..sun.misc.Launcher$AppClassLoader@a39137 ....file:/C:/Development/jboss-4.0.2/bin/run.jar ..sun.misc.Launcher$ExtClassLoader@92e78c ....file:/C:/Program%20Files/Java/jre1.5.0_10/lib/ext/dnsns.jar ....file:/C:/Program%20Files/Java/jre1.5.0_10/lib/ext/sunjce_provider.jar ....file:/C:/Program%20Files/Java/jre1.5.0_10/lib/ext/sunpkcs11.jar ++++CodeSource: (file:/C:/Development/jboss-4.0.2/server/all/tmp/deploy/tmp43145UserIndexEAR.ear-contents/UserIndexEJB.jar ) Implemented Interfaces: ++interface javax.ejb.SessionBean(1464fee) ++++ClassLoader: org.jboss.mx.loading.UnifiedClassLoader3@125d61e{ url=file:/C:/Development/jboss-4.0.2/server/all/tmp/deploy/tmp43073jboss-service.xml ,addedOrder=2} ++++CodeSource: (file:/C:/Development/jboss-4.0.2/server/all/lib/jboss-j2ee.jar ) ### Instance0 found in UCL: org.jboss.mx.loading.UnifiedClassLoader3@945d2d{ url=file:/C:/Development/jboss-4.0.2/server/all/tmp/deploy/tmp43145UserIndexEAR.ear ,addedOrder=39} Please advise View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4061537#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...