HttpWebRequest beta2 problem?

 Hi!
 Can someone tell what am i doing wrong here?
this function works great in beta1 but in beta2 
"request.BeginGetRequestStream(new AsyncCallback(RequestProceedSearch), request);"
line seems not to call "RequestProceedSearch" function. am i missing something obvious?

//----------------------------------------------------------------------------------------------------
        private void searchindex_f(object sender, RoutedEventArgs e)
        {
            //-------------------------------------------------
            string _serverpath = "http://localhost/silverlight/";
            //------------------------------------------------- &n ...