Okay, I have managed to get the web service client to stream its request to
an XML file which I then FTP onto the server.  What I need to do next is to
HTTP Post that XML to the real web service....

WebService definition
=====================
        [WebMethod]
        public string StartSession(string deviceUniqueID, string
applicationVersion)
        {
            return "SessionID";
        }

CLIENT
======
        private string QueryXml = "<?xml version=\"1.0\"
encoding=\"utf-8\"?><soap:Envelope
xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\"
xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"
xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\"><soap:Body><StartSession
xmlns=\"http://tempuri.org/\"><deviceUniqueID>123</deviceUniqueID><applicationVersion>12
3</applicationVersion></StartSession></soap:Body></soap:Envelope>";

        private void Form1_Load(object sender, EventArgs e)
        {
            HttpWebRequest request = (HttpWebRequest)
WebRequest.Create("http://localhost/HandheldVendorWebService/SyncService.asmx");
            request.Method = "POST";
            request.ContentType = "text/xml";
            request.ContentLength = QueryXml.Length;
            byte[] postData = System.Text.ASCIIEncoding.ASCII.GetBytes(QueryXml);
            request.GetRequestStream().Write(postData, 0, postData.Length);
                        /*******************************/
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            Stream responseStream = response.GetResponseStream();
            StreamReader reader = new StreamReader(responseStream);
            textBox1.Text = reader.ReadToEnd();
        }The QueryXml string is exactly what is generated by the client to call
StartSession().  When I call request.GetResponse() I get "500 Internal
server error", but this works fine in the test page inside Internet
Explorer.Any ideas?ThanksPete