oofki

I used code that was in an example and modified it some to do some tests. It's just a basic web server. Well id say 2/3 requests I sent get back a 503 error. I've attached the code, it doesn't make sense to me. I tried changing to 4.2 as well and that did not fix it:

using System;
using System.Net;
using System.Net.Sockets;
using System.Threading;
using Microsoft.SPOT;
using Microsoft.SPOT.Hardware;
using SecretLabs.NETMF.Hardware;
using SecretLabs.NETMF.Hardware.NetduinoPlus;
using System.Text;


namespace NetduinoPlusApplication1
{
    public class Program
    {
        public static OutputPort led;
        public static WebServer webServer;
        public static void Main()
        {
             led = new OutputPort(Pins.ONBOARD_LED, false);
             webServer = new WebServer();
             webServer.ListenForRequest();
        }
        public class WebServer : IDisposable
        {
            private Socket socket = null;
            public WebServer()
            {
                socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
                socket.Bind(new IPEndPoint(IPAddress.Any, 80));
                socket.Listen(10);
                ListenForRequest();
            }
            public void ListenForRequest()
            {
                while (true)
                {
                    using (Socket clientSocket = socket.Accept())
                    {
                        int bytesReceived = clientSocket.Available;
                        if (bytesReceived > 0)
                        {
                            byte[] buffer = new byte[bytesReceived];
                            clientSocket.Receive(buffer, bytesReceived, SocketFlags.None);
                            string request = new string(Encoding.UTF8.GetChars(buffer));
                            int start = request.IndexOf("cmd=");
                            string OMG = "";
                            if (start > 0)
                            {
                                    start += 4;
                                    int stop = request.IndexOf(" ", start);
                                    OMG = request.Substring(start, stop - start);
                            }     
                            switch(OMG)
                            {
                                case"START":
                                    led.Write(true);
                                    break;
                                case "STOP":
                                    led.Write(false);
                                    break;
                                default:
                                    break;
                            }
                            string header = "HTTP/1.0 200 OK\r\nContent-Type: text; charset=utf-8\r\nContent-Length: " + OMG.Length.ToString() + "\r\nConnection: close\r\n\r\n";
                            clientSocket.Send(Encoding.UTF8.GetBytes(header), header.Length, SocketFlags.None);
                            clientSocket.Send(Encoding.UTF8.GetBytes(OMG), OMG.Length, SocketFlags.None);
                        }
                    }
                }
            }
            #region IDisposable Members
            ~WebServer()
            {
                Dispose();
            }
            public void Dispose()
            {
                if (socket != null)
                    socket.Close();
            }
            #endregion
        }
    }
}