Not Receive more than one data from arduino through bluetooth in windows phone 8

Using Arduino Networking, Protocols, and Devices
1

I have Arduino Uno R3 with Wireless Proto Shield and I want to communicate with Windows Phone 8.

I am using the base from the example : http://katastrophos.net/nokia-wiki/www.developer.nokia.com/Community/Wiki/Windows_Phone_8_communicating_with_Arduino_using_Bluetooth.html

This is an asynchronous receiving method:

  private async void ReceiveMessages(object sender, DoWorkEventArgs e)
        {
            try
            {
                while (true)
                {

                    // Read first byte (length of the subsequent message, 255 or less). 
                    uint sizeFieldCount = await dataReader.LoadAsync(1);
                    if (sizeFieldCount != 1)
                    {
                        // The underlying socket was closed before we were able to read the whole data. 
                        return;
                    }

                    // Read the message. 
                    uint messageLength = dataReader.ReadByte();
                    uint actualMessageLength = await dataReader.LoadAsync(messageLength);
                    if (messageLength != actualMessageLength)
                    {
                        // The underlying socket was closed before we were able to read the whole data. 
                        return;
                    }
                    // Read the message and process it.
                    string message = dataReader.ReadString(actualMessageLength);
                    MessageReceived(message);
                }
            }
            catch (Exception ex)
            {
                Debug.WriteLine(ex.Message);
            }

        }

I have some methods that sends me back info from the Arduino, (SendCarId, SendRideId)

If I try to send each of this commands by itself it will send me back (from the Arduino) the right data.

But when I send the requests one after other it only response to the first and not to the second. (it never get the second time to the method ReceiveMessages )

Anyone have idea what is the problem?