attempting HelloWorld service, getting NULL return value

[Marty Saxton]

I am using CXF as both the client and server, and I'm just trying to get
the following simple service working:
 
@WebService
public interface HelloWorld {
    String sayHi(String text);
}
 
 
The implementation just returns "Hello " + text.  I examined the XML
flowing between the client & server and it appears correct, the server
is returning a correct message.  On the client side, using the jax-ws
frontend, I get a null instead of a string for the return value.  I must
be doing something terribly wrong, but I'm not sure where to begin
debugging this problem.
 
Thanks in advance!