Isn't there anyone out ther who has an idea why is this not working and/or if there is any workaround?
I cannot even get a simple Object to work with a subtype. The generated wsdl doesn't even defines the hierarchy. I did modify the wsdl by myself but had no luck. The object is allways getting unmarshalled as the supertype and I get and unmarshalling error if a subtype's property is sent to the server.
Thanks again for your help!