I have a process where I need to do a GET against a URL and receive an
XML response.  I have to verify authenticity with this site, so need a
cert attached to the post.  I was provided ASP code which works fine,
but I need to do this in .NET.  I'm using Framework 1.1 and WSE2.0.
This is (most of) my code:

       Dim certStore As WseX509.X509CertificateStore =
WseX509.X509CertificateStore.LocalMachineStore(WseX509.X509CertificateStore.MyStore)

       Dim open As Boolean = certStore.OpenRead()
       Dim cert2 = GetCertificate("MyCertName", certStore)

       wrequest = CType(WebRequest.Create(url), HttpWebRequest)
       With wrequest
           .Method = "GET"
           .Timeout = 5000
           .ClientCertificates.Add(cert2)
           .KeepAlive = False
       End With

       'get the response from the request
       wresponse = CType(wrequest.GetResponse(), HttpWebResponse)
       ResponseStream = wresponse.GetResponseStream
       'Hook up a streamreader to the stream for ease of reading
       ResponseStreamReader = New
System.IO.StreamReader(ResponseStream)
       strXMLResponse = ResponseStreamReader.ReadToEnd()

The service keeps responding back saying the Cert is not attached - but
I can query it when it's attached to the GET and it looks ok to me.
Any thoughts?