Hello, I'd really appreciate somebody's help here. As I said earlier the web services work fine in a war file. These are JAX-RPC web services. The problem is that I have to deploy them in a sar file, as there's also a MBean. The message I get when I deploy the web service in a sar file is: [[/myapp]] Marking servlet MyWebService as unavailable 13:59:04,139 ERROR [[MyWebService]] Allocate exception for servlet MyWebService java.lang.ClassCastException: com.mycom.myapp.ws.services.MyWebServiceImpl Do I need to change the deployment descriptors or something else. I've been trying to find information on the net, but so far I've been unsuccessfull. Thanks. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3976960#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...