Problems with an application under jboss-4.0.3SP1

[knutschik]

Hello all,
I have a normal J2EE-Application which uses struts. I can deploy and use the application under jboss-4.0.1 without errors.
When I use jboss-4.0.3SP1 the deployment is fine, but there are exceptions by using the application in some struts actions.
The exception is the following:
java.lang.ClassCastException: $Proxy71
actions.KundeErfassenAnzeigenAction.perform(KundeErfassenAnzeigenAction.java:34)
org.apache.struts.action.ActionServlet.processActionPerform(ActionServlet.java:1787)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1586)
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:510)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81)

Here a snippet from the source of the action:

if(obj == null) {
 try {
 InitialContext ic = new InitialContext();
 line:34 OnlineShopHome onlineShopHome = (OnlineShopHome) ic.lookup("OnlineShop");
 onlineShop = onlineShopHome.create();
 httpSession.setAttribute("OnlineShop", onlineShop);
 }

Can somebody help me?
thanks

[peterj]

Is OnlineShopHome a remote home? If so, line 34 should read:

OnlineShopHome onlineShopHome = (OnlineShopHome)javax.rmi.PortableRemoteObject.narrow(ic.lookup("OnlineShop"), OnlineShopHome.class);

At least, that is what works for me. (If I look up a local home I can cast that directly without problems, but the rmeote homes always return proxies, hence the need to use the PortableRemoteObject.)