Using the push Notification freeze the queries

   Hi,
I am stuck in the Push notification since some times and I can't find what is wrong in my project.

Here is my problem :
I created a push service on the server. As soon as I register to this service, all my queries in the application takes forverer.
Let's say I create a Company in a ViewModel and a 2nd Viewmodel query the cache to load this same entity (on the exact same model as Cocktail). This should be very fast but no, it can takes more than 1 minute (when it doesn't timout ...) !

If I don't register to the service, the application works just fine.

I tried to look what's going on in fiddler and the entityService.svc/sl waits for the response all the time.

About the configuration I added the notificationService key to the web.config and added the SL5 server polling dll to the server.
On the client I added the SL5 polling dll and the push dll of devforce.

I did try to reproduce it on Temphire but it works just fine. I have the same configuration, same assemblies (I even converted temphire to SL5 to check if the problem was with SL5).

Nothing looks wrong in the logs, I compared the Temphire's logs with mine and they have the same stuff about the notification.

I am using Devforce 6.1.8 with cocktail.

What could cause this delay ? What should I look for ?

if that matter, here is my test push service (and it works, I get the notification on the client) :

        [AllowRpc]
        public static void NewDossiersAdministratifs(Guid serviceKey, INotificationManager notificationManager, EntityManager entityManager)
        {
            _serviceKey = serviceKey;
            _notificationManager = notificationManager;
            _manager = new AdministratifEntities(entityManager);

            while (true)
            {
                Check();
                // Sleep de 30 seconds entre les checks
                Thread.Sleep(1000 * 30);
            }
        }

        private static void Check()
        {
            var subscribers = _notificationManager.GetSubscribers(_serviceKey); 
            if (!subscribers.Any()) return;

            var ids = new List<int>() {1, 2};
            foreach (var subscriber in subscribers)
            {
                _notificationManager.Send(_serviceKey, subscriber, ids);
            }
        }