System.Threading.Timer not ticking on Windows Server 2003
protected override void OnStart(string[] args)
   {
        int interval = Int32.Parse(ConfigurationManager.AppSettings["SleepTime"]) * 1000;
        TimerCallback cb = new TimerCallback(ProcessTimerEvent);
        QueueWorker worker = new QueueWorker();
        workTimer = new Timer(cb, worker, interval, 1000);

    }
    private static void ProcessTimerEvent(object obj)
    {
        if (obj is QueueWorker)
        {
            QueueWorker qw = (QueueWorker)obj;
            qw.doWork();
        }
    }
    class QueueWorker
    {
        public void doWork()
        {
           // work happening here
        }
    }

System.Diagnostics.Debug.WriteLine("Beginning of Timer event...");

System.Diagnostics.Debug.WriteLine("End of Timer event");