I'm getting a SoapHeaderException when I play with adding a
UsernameToken to a Soap message. I'm trying to learn how to use WSE
Authentication for a new project and I'm essentially setting up a
HelloWorld.

My client code is as follows:

proxy.Service1Wse wseProxy = new proxy.Service1Wse();
wseProxy.RequestSoapContext.Security.Tokens.Add( new        
        UsernameToken(txtUser.Text,
                txtPw.Text,
            PasswordOption.SendPlainText));
txtResponse.Text += wseProxy.HelloPlain("button2");

and my Web Service method looks like this:

[WebMethod]
public string HelloPlain(string name)
    {
    if (RequestSoapContext.Current.Security.Tokens.Count > 0)
        return "Greater than 0 tokens.";
    return "Received: " + name;
    }

This is the error I receive.

An unhandled exception of type
'System.Web.Services.Protocols.SoapHeaderException' occurred in
system.web.services.dll

Additional information: Microsoft.Web.Services2.Security.SecurityFault:
The security token could not be authenticated or authorized
   at
Microsoft.Web.Services2.Security.Tokens.UsernameTokenManager.OnLogonUserFailed(UsernameToken
token)
   at
Microsoft.Web.Services2.Security.Tokens.UsernameTokenManager.LogonUser(UsernameToken
token)
   at
Microsoft.Web.Services2.Security.Tokens.UsernameTokenManager.AuthenticateToken(UsernameToken
token)
   at
Microsoft.Web.Services2.Security.Tokens.UsernameTokenManager.VerifyToken(SecurityToken
securityToken)
   at
Microsoft.Web.Services2.Security.Tokens.SecurityTokenManager.LoadXmlSecurityToken(XmlElement
element)
   at
Microsoft.Web.Services2.Security.Tokens.SecurityTokenManager.GetTokenFromXml(XmlElement
element)
   at Microsoft.Web.Services2.Security.Security.LoadXml(XmlElement element)
   at
Microsoft.Web.Services2.Security.SecurityInputFilter.ProcessMessage(SoapEnvelope
envelope)
   at Microsoft.Web.Services2.Pipeline.ProcessInputMessage(SoapEnvelope
envelope)
   at
Microsoft.Web.Services2.WebServicesExtension.BeforeDeserializeServer(SoapServerMessage
message)

I'm developing with VS.NET 2003 and WSE 2.0.  Any advice on what I need
to do to successfully attach a token to a message?

Thanks.

-Ben