I did not try the samples. I upgraded from the version shipping with JBoss 4.0.5.GA. The version included in JBoss 4.0.5.GA worked, but had a problem. 2007-02-27 22:59:30,052 ERROR [org.jboss.ws.jaxrpc.CallImpl] Call invocation failed with unkown Exception javax.xml.rpc.JAXRPCException: Cannot obtain deserializer factory for: [xmlType= {http://localhost:8080/xxx/}>XXX,javaType=class com.XXX] at org.jboss.ws.soap.SOAPContentElement.getDeserializerFactory(SOAPContentElement.java:421) at org.jboss.ws.soap.SOAPContentElement.getObjectValue(SOAPContentElement.java:230) at org.jboss.ws.binding.EndpointInvocation.transformPayloadValue(EndpointInvocation.java:233) at org.jboss.ws.binding.EndpointInvocation.getReturnValue(EndpointInvocation.java:182) After I upgraded, this problem went away. However, I ran into this new issue. "heiko.braun(a)jboss.com" wrote : Did you try the samples that ship with 1.2.0? When exactly does this error occur? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4024376#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...