webservice return type package

[sawe]

(jboss4.2.1.GA, jbossws-native-2.0.3.GA, JBossTools 2.0.0.GA, eclipseEE3311)

I've deployed a @Stateless @WebService bean with a method like:

package x.y.Z;

public a.b.C doMagic();

In the WSDL at the deployement URL, the returntype C is changed to x.y.C
(i expected a.b.C, webservice newbie here :-)

My question: can i, with annotations, force the wsdl (and subsequent client stubs) to be generated with package structures that resemble the java webservice?
A @WebResult(targetNamespace = "http://b.a") doesn't seem to have the desired effect.

thanks much.