How to pass parameters to a web service method

The service method in Stub is

public CrewNames_x0028__x0029_Response crewNames( CrewNames_x0028__x0029_ parameters) {

.....

setAttachments(_call);

try {java.lang.Object _resp = _call.invoke(new java.lang.Object[] {parameters});

return CrewNames_x0028__x0029_Response;

}

My method as

...

CrewNames_x0028__x0029_ paras= new CrewNames_x0028__x0029_ ();

CrewNames_x0028__x0029_Response response= stub.crewNames(paras);

....

return response;

...

The result of calling this method is

null

[582 byte] By [paulstationa] at [2007-10-2 16:35:51]