>Can you post the class code of MyClassSoapClient - definition + constructors - no need for the rest of the code
This doesn't work because this default Web Service reference added to the project was in SOAP. Thus, in SOAP, if I want to adjust the URL, I need to avoid passing the namespace. Doing so allows me to change the URL. But, this is SOAP, so I need to pass an enveloppe and cannot use high level parameter passing.
I will adjust the inclusion of that Web Service in the project to be high level. That will resolve all the issues.