Java EE (Java Enterprise Edition) General Discussion

I have created a very Simple Web Service using Netbeans 6.0 as an EJB Module. I have successfully created clients to access the web service, both through a Composite Application and through a simple Java Desktop Application, using the create "New Web Service Client" option, either by pointing to the EJB project either by providing the WSDL URL.
What I want now, is for the Java Desktop application to be able to consume the service after it has discovered the WSDL URL at runtime (e.g. through UDDI).

From what I have been able to find on the web, I should use the javax.xml.ws.Service class. But when I attempt to use the getPort method I get the exception:
"com.sun.xml.ws.model.RuntimeModelerException: runtime modeler error: Wrapper class mypackagename.jaxws.MyWebServiceName is not found. Have you run APT to generate them?"
Since I know that this class is not needed for the Web Service to be accessed, when the two procedures I describe above are used, I wonder what I can do to get this to work.

I have tried using apt from the command line but it can't find Java EE classes, so it doesn't work.

Nikos