HttpWebRequest，post方法

I have a small problem with HttpWebRequest in my wp 7.1 application. The application sends some game stats data to the php server by POST -method, but server doesn't fetch it. The $_POST array stays empty. With the aid of the WireShark I can see the data is in the packet sent to the server, but server doesn't receive any.

Here is the code of the method by which the data is sent:

    private void SendStatisticsToServer()
    {
        if (this.stat.Name == String.Empty || Object.ReferenceEquals(this.stat.Name, null))
        {
            this.OnEmptyNameEvent();
        }
        else
        {
            HttpWebRequest request = WebRequest.Create(ADDRESS) as HttpWebRequest;
            request.Method = "POST";
            request.ContentType = "text/plain";
            request.AllowReadStreamBuffering = false;

            request.BeginGetRequestStream(new AsyncCallback(GetRequestStreamCallBack), request);
        }
    }

    private void GetRequestStreamCallBack(IAsyncResult requestRes)
    {
        StringBuilder builder = new StringBuilder("user=");
        builder.Append(this.stat.Name);
        builder.Append("&won=");
        builder.Append(this.stat.Won == true ? "1" : "0");
        builder.Append("&scores=");
        builder.Append(this.stat.Scores.ToString());

        Byte[] byteArray = Encoding.UTF8.GetBytes(builder.ToString());

        HttpWebRequest request = requestRes.AsyncState as HttpWebRequest;
        Stream stream = request.EndGetRequestStream(requestRes);
        stream.Write(byteArray, 0, byteArray.Length);
        stream.Flush();
        stream.Close();

        request.BeginGetResponse(new AsyncCallback(GetResponseCallback), request);
    }

    private void GetResponseCallback(IAsyncResult requestRes)
    {
        HttpWebRequest request = requestRes.AsyncState as HttpWebRequest;

        HttpWebResponse response = request.EndGetResponse(requestRes) as HttpWebResponse;
        Stream stream = response.GetResponseStream();
        StreamReader streamRead = new StreamReader(stream);
        String responseString = streamRead.ReadToEnd();
        stream.Close();
        streamRead.Close();

        response.Close();
        this.OnExitButtonPressedEvent(ButtonType.Exit);
    }

(I'm sorry for the code with no comments, but I think it's self-explanatory )

As you can see, it's almost copy-past from the msdn.

And here is the php -server code:

    <?php
     header('Content-type: text/plain'); 
     // HTTP/1.1
     header("Cache-Control: no-store, no-cache, must-revalidate");
     // HTTP/1.0
     header("Pragma: no-cache");
     $logfile = 'postdata.txt';
     $firstData = $_POST["user"];
     $secondData = $_POST["won"];
     $thirdData = $_POST["scores"];
     $file = fopen($logfile, "a+");

     fwrite($file, "Post received - data: firstData=". $firstData . "   
     secondData=" . $secondData . " thirdData=" . $thirdData . "
");
     fclose($file);

     ?>

As you can see, this server doesn't do much - only receiving the data and pushing it into the log -file.

it is definitely not a server's bug, since the old application written in Qt works fine under the same conditions and the $_POST array is not empty.

Could you, please, tell me, where could be a possible error?

The target platform is WP 7.1.

Thank you beforehand for your answers.

I'm going to have to do this as an answer, but I'm not entirely sure this is correct. I believe for a text/plain post, the format of the parameters is:

user=d
won=1
scores=3

If the you do application/x-www-form-urlencoded, then you would go with

user=d&won=1&scores=3

There's also a possibility PHP doesn't support text/plain.