Web Service Authentication User Validation Error using digest authentication.

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C#

.NET

webservice

I am trying to write a c#.Net application to communicate with a 3rd party web service. I have been given a link to the wsdl. I can create the web service reference but when I attempt to send a request to the web service I receive the error "User Validation Error". The web service company uses "digest" authentication but beyond they can't offer much assistance as they are not familiar with .net applications. They did provide me with a lengthy java code example but that doesn't help me much. I am using vs 2005 and have installed WSE3. One thing I noticed is that according to the online documentation I've read, when I create the web service reference (MyService) I'm supposed to see a namespace named MyServiceWse. I never see that namespace. I don't know if that is because of something I'm doing wrong or something with the wsdl. All the examples I have been able to find either use WSE3 and reference the MyServiceWse namespace, or use WSE2, and use "basic" authentication. Does anyone have an example of using WSE3 and "digest"? Or does anyone know why I'm not seeing my wse namespace?
Any help or advice is appreciated. I am fairly new to .net programming and have never written a web service client.
Thanks,
Bob