Authenticating the MB webservice in .net?

System

I am writing a .net web site that calls the mediabin web service...i can reference the web service fine in the code, the kicker is i dont see which method to use to authenticate the user so i keep getting "The request failed with HTTP status 401: Unauthorized."

which method should be used? ive tried to disable authentication in the MB web service web.config and that doesnt work either...

BeginPersistentConnection? CreateAuthenticationTicket? CreateTrustedClientPassword? ValidateCurrentUser?

the documentation is sparse in the server API guide - are there any examples of calling MB webservies with .NET?

[HTML] // Web reference to the MediaBin web service
MediaBinService.MediaBinServer testCall = new MediaBinService.MediaBinServer();

protected void Page_Load(object sender, EventArgs e)
{
testCall.???
}[/HTML]