Chat sample SignalR cannot connect.

[MehdiJafari84]

Hello
Your chat sample can not connect!
I installed NCache in my MVC project but I have same error with SignalR 2.4.0 as you suggested.
Error:
Could not connect:Error: No transport could be initialized successfully. Try specifying a different transport or none at all for auto initialization.

public void Configuration(IAppBuilder app)
        {
            var hubConfiguration = new HubConfiguration
            {
                EnableJavaScriptProxies = true
            };
            ConfigureOAuth(app);
            string cache, eventKey, userId = null, password = null;
            if (ConfigurationManager.AppSettings["cache"] != null)
                cache = ConfigurationManager.AppSettings["cache"];
            else
                throw new Exception("Cache Name is required to start the application");
            if (ConfigurationManager.AppSettings["eventKey"] != null)
                eventKey = ConfigurationManager.AppSettings["eventKey"];
            else
                throw new Exception("EventKey is required to start the application");
            if (ConfigurationManager.AppSettings["userID"] != null)
                userId = ConfigurationManager.AppSettings["userID"];
            if (ConfigurationManager.AppSettings["password"] != null)
                password = ConfigurationManager.AppSettings["password"];
            GlobalHost.DependencyResolver.UseNCache(cache, eventKey, userId, password);
            app.MapSignalR(hubConfiguration);
        }