TaskFactory AutoResetEvent DeadLock on Window Service

[d87c]

Hi all C# gurus I need advice on Deadlock I have a code structure for Window Service, multithreading, task factory like

public partial class rs : ServiceBase
{
private Queue jobQueue = Queue.Synchronized(new Queue());
private Queue DatafeedQueue = Queue.Synchronized(new Queue());
private Dictionary<...> ScheduleJobs = new Dictionary<...>();
private AutoResetEvent _BlockThreadTaskScheduler = new AutoResetEvent(true);
private AutoResetEvent _BlockThreadDatafeedSourceTaskScheduler = new AutoResetEvent(false);
private LimitedConcurrencyLevelTaskScheduler _TaskScheduler;
private LimitedConcurrencyLevelTaskScheduler _DatafeedSourceTaskScheduler;

    public rs()
    {
		InitializeComponent();
		\_timer = new System.Timers.Timer(POLL\_INTERVAL\_MINUTE \* 60 \* 1000);
		\_timer.Elapsed += new System.Timers.ElapsedEventHandler(\_timer\_Elapsed);
		\_TaskScheduler = new LimitedConcurrencyLevelTaskScheduler(2);
		\_DatafeedSourceTaskScheduler = new LimitedConcurrencyLevelTaskScheduler(1);
  
		protected void \_timer\_Elapsed(object sender, ElapsedEventArgs e)
		{
			try
			{
				DatafeedQueue.Clear();
				try
				{
					(Execute a stored procedure here)
					while(xxx.Read())
					{
						DatafeedObj dfo = new DatafeedObj();
						...
						DatafeedQueue.Enqueue(dfo);
					}
				}
				catch()...
			
			TaskFactory DatafeedSourceFactory = new TaskFactory(\_DatafeedSourceTaskScheduler);
			// DatafeedQueue.Count = 3
			for (int i = 0; i < DatafeedQueue.Count; i++)
			{
				DatafeedSourceFactory.StartNew(() => processDatafeedQueue());
			}

			\_BlockThreadDatafeedSourceTaskScheduler.Set();

			}
			catch()...
		}
		private void processDatafeedQueue()
		{
			\_BlockThreadDatafeedSourceTaskScheduler.WaitOne();
			try
			{
				lock (DatafeedQueue.SyncRoot)
				{
					if (DatafeedQueue.Count > 0)
					{
						DatafeedObj dfo = ((DatafeedObj)(DatafeedQueue.Dequeue()));
						
						#region DataFeed Type A
						
						ScheduleJobs = (Calls a static class, static method);
						jobQueue = (Calls a static class, static method turn ScheduleJobs  dictionary into Queue);
						var factory = new TaskFactory(\_TaskScheduler);
						for (int i = 0; i < jobQueue.Count; i++)
						{
							factory.StartNew(() => startTypeA());
						}
						
						#endregion
						  
						#region DataFeed Type B
						
						ScheduleJobs = (Calls a stat