cannot log in using httpwebrequest
String parameters="username=myusername&password=mypassword";
byte[] buffer = Encoding.ASCII.GetBytes(parameters);
HttpWebRequest WebReq =
  (HttpWebRequest)WebRequest.Create(myrul_goes_here);

WebReq.Method = "POST";
WebReq.ContentType = "application/x-www-form-urlencoded";
WebReq.ContentLength = buffer.Length;
Stream PostData = WebReq.GetRequestStream();
PostData.Write(buffer, 0, buffer.Length);
PostData.Close();
HttpWebResponse WebResp = (HttpWebResponse)WebReq.GetResponse();
Response.Write(WebResp.StatusCode);
Response.Write(WebResp.Server);
Stream Answer = WebResp.GetResponseStream();
StreamReader _Answer = new StreamReader(Answer);
Response.Write(_Answer.ReadToEnd());

Response.Write(_Answer.ReadToEnd()+
    "<script src='js/myjs.js' type='text/javascript'></script>");