I'm trying to fill out a form on a website from within a web service.  I know
there is one field on that form called "call" and I want to put the value
"register" in it.  I'm using the following code, but I can't get it to work.  
Any Suggestions?  I suspect the problem is in the way i'm specifying the
string to send because i get an answer saying the Call parameter was not set:

string myDataString= "<INPUT TYPE=\"hidden\" NAME=\"call\"
VALUE=\"register\">";

HttpWebRequest request = (HttpWebRequest)
    WebRequest.Create(ConfigurationSettings.AppSettings["AdidasCUDSite"]);
request.Method = "POST";
request.ContentType = "text/xml";
byte[] postInfo = System.Text.UnicodeEncoding.ASCII.GetBytes(myDataString);
request.ContentLength = postInfo.Length;
Stream s = request.GetRequestStream();
s.Write(postInfo,0,postInfo.Length);

// execute the request
HttpWebResponse response = (HttpWebResponse)request.GetResponse();

// we will read data via the response stream
Stream resStream = response.GetResponseStream();
StreamReader reader = new StreamReader(resStream);
string responseStr = reader.ReadToEnd();