Httpwebrequest POST

HttpWebRequest myHttpWebRequest = (HttpWebRequest)WebRequest.Create("http://192.168.1.50/julie/test.aspx");
                // Set AllowWriteStreamBuffering to 'false'.
                myHttpWebRequest.AllowWriteStreamBuffering = false;
               
               
                string postData = "userid=232";
                // Set 'Method' property of 'HttpWebRequest' class to POST.
                myHttpWebRequest.Method = "POST";
                ASCIIEncoding encodedData = new ASCIIEncoding();
                byte[] byteArray = encodedData.GetBytes(postData);
                // Set 'ContentType' property of the 'HttpWebRequest' class to "application/x-www-form-urlencoded".
                myHttpWebRequest.ContentType = "application/x-www-form-urlencoded";
                // If the AllowWriteStreamBuffering property of HttpWebRequest is set to false,the contentlength has to be set to length of data to be posted else Exception(411) is raised.
                myHttpWebRequest.ContentLength = byteArray.Length;
                Stream newStream = myHttpWebRequest.GetRequestStream();
                newStream.Write(byteArray, 0, byteArray.Length);
                newStream.Close();
                Console.WriteLine("\nData has been posted to the Uri\n\nPlease wait for the response..........");
                // Assign the response object of 'HttpWebRequest' to a 'HttpWebResponse' variable.
                HttpWebResponse myHttpWebResponse = (HttpWebResponse)myHttpWebRequest.GetResponse();


Nogen der kan fortælle mig hvorfor det der ikke poster som det skal? Har fundet den ca samme stump kode flere steder men ingen af dem poster parametre med over?