I have overidden the SOAPMappingRegistry class to pre-map my own types. This works fine on the client. However, I am having trouble getting the server to use this premapped class. According to the docs I shouldn't have to register all of those serializers with the Deployment Descriptor if I have a class that already maps them. Is this not true? Here is the mappings fragment of my current deployment descriptor. <isd:mappings defaultRegistryClass="foo.bar.OverriddenMappingRegistry"/> Thanks in advance, Justin Hagemeier