Response.IsClientConnected in Asynchronous Web Service

Question

Hello, I'm developping a web service. The role of this one is maintaining a client list and and sending messages to them. In fact this web service is like a P2P server. I found a solution but it is only working on my computer (XP - IIS 5.2) and it do not work on the server (2003 - IIS 6.0) ... This solution is to store the HttpContext for each call of the WaitMessage() method (this one send a response in an undeterminated time to the client - perhaps 2 hours after the request...). Then a thread is browsing the client list and test if the client is still connected: [code] for(...) client = ClientList[i]; if(client.Context.Response.IsClientConnected==false) { // delete of the client } [/code] The problem is that this method (IsClientConnected) always returns true, wether the client is disconnected or not ! (and only with the server - it's works on my computer) Does somebody know why? I tried then to get the socket used by HttpResponse , and then tried to test the state (ESTABLISHED?) of this one... but i didn't find how to get the socket... Help...