[3.0/LINQ] CoD4 Rcon Class

I've searched and searched and searched. No matter what my search phrase, I run across this post. Here is my source, I don't necessarily need to be able to receive, in fact I hear you don't even need to receive...Anyway, the problem I seem to be encountering is this: I seem to be able to only send one command... :/

I've used Modern Rcon with all the *correct* information and everything works great...but my own attempt at a hand-written class fails. :/

Code:

---

namespace St0rmCoD4.Common.Data
{
    using St0rmCoD4;

    using System;
    using System.Collections.Generic;
    //using System.IO;
    using System.Linq;
    using System.Net;
    using System.Net.Sockets;
    using System.Text;
    using System.Threading;

    /// <summary>
    /// CoD4 RCON Class
    /// </summary>
    public class Rcon
    {
        #region Singleton
        private static Rcon m_Instance = null;
        /// <summary>
        /// Represents a Singleton instance of the RCON Object
        /// </summary>
        public static Rcon Instance
        {
            get
            {
                if (m_Instance == null)
                {
                    m_Instance = new Rcon();
                }
                return m_Instance;
            }
        }
        #endregion

        #region Fields
        private UdpClient m_Client = null;
        private IPEndPoint m_EndPoint = null;
        private bool m_Started = false;
        #endregion

        #region Properties
        private string m_RconHost = string.Empty;
        /// <summary>
        /// Sets the Rcon Host address
        /// </summary>
        public string Host
        {
            set
            {
                m_RconHost = value;
            }
        }

        private string m_RconPass = string.Empty;
        /// <summary>
        /// Sets the Rcon password
        /// </summary>
        public string Password
        {
            set
            {
                m_RconPass = value;
            }
        }

        private int m_RconPort = 28960;
        /// <summary>
        /// Sets the Rcon port
        /// </summary>
        public int Port
        {
            set
            {
                m_RconPort = value;
            }
        }
        #endregion

        #region Events
        public delegate void DataHandler(string data);
        /// <summary>
        /// Triggered when the Rcon server replies with data
        /// </summary>
        public event DataHandler OnData;
        protected virtual void DataRecieveHandler(string data)
        {
            if (OnData != null)
            {
                OnData(data);
            }
        }
        #endregion

        #region Methods
        /// <summary>
        /// Call this before attempting to send otherwise an exception will be thrown!
        /// </summary>
        public void StartUp()
        {
            if (m_RconPass == string.Empty)
            {
                return;
            }

            if (m_Started) { return; }

            m_Client = new UdpClient(m_RconPort);
            m_EndPoint = new IPEndPoint(IPAddress.Parse(m_RconHost), m_RconPort);
            new Thread(
                () =>
                {
                    byte[] buffer = new byte[1024 * 5];
                    while (true)
                    {
                        buffer = m_Client.Receive(ref m_EndPoint);
                        if (buffer.Length != 0)
                        {
                            DataRecieveHandler(Encoding.Default.GetString(buffer, 0, buffer.Length));
                        }
                    }
                }
            ).Start();
            m_Started = true;
        }

        public bool Send(string data)
        {
            if (m_Client == null)
            {
                throw new NullReferenceException("UdpClient is null; Did you forget to call StartUp()?");
            }

            string sendData = String.Format("\xFF\xFF\xFF\xFF rcon {0} {1}", m_RconPass, data);
            byte[] dataSend = new byte[1024];
            dataSend = Encoding.Default.GetBytes(sendData);
            return (m_Client.Send(dataSend, dataSend.Length, m_EndPoint) > 0);
        }

        public bool Login()
        {
            if (m_Client == null)
            {
                throw new NullReferenceException("UdpClient is null; Did you forget to call StartUp()?");
            }

            string sendData = String.Format("\xFF\xFF\xFF\xFF rcon login {0}", m_RconPass);
            byte[] dataSend = new byte[1024];
            dataSend = Encoding.Default.GetBytes(sendData);
            return (m_Client.Send(dataSend, dataSend.Length, m_EndPoint) > 0);
        }
        #endregion
    }
}

---

Without CoD4 documentation on their rcon, most likely no one here will be able to help.

2 things that I can think of.

1.) Maybe you do need to receive the packets. (IE, maybe their is a packet that gives you a session ID which you replace with the password).

2.) Maybe any packet after the first doesn't require the password to be included.

There are tons of reasons, but without documentation no one here can help...