Asp.net 信号器401错误（$.connection.hub.start（））

我试图在我的页面中使用信号器连接到集线器：

            $(function() {
            var rateHubProxy = $.connection.rateHub;
            //...
            $.connection.hub.url = 'http://localhost:8081/signalr';
            $.connection.hub.connectionSlow(function () {
                console.log('We are currently experiencing difficulties with the connection.')
            });
            $.connection.hub.error(function (error) {
                console.log('SignalR error: ' + error)
            });
            $.connection.hub.start()
                .done(function(){ console.log('Now connected, connection ID=' + $.connection.hub.id); })
                .fail(function(){ console.log('Could not Connect!'); });
        });

但是我在

$.connection.hub.start（）中有401。RateHub具有Authorize属性。
我的应用程序中的启动配置：

public void Configuration(IAppBuilder app)
    {
        app.UseCors(CorsOptions.AllowAll);

        CookieAuthenticationOptions cookieOptions = new CookieAuthenticationOptions()
        {
            AuthenticationType = CookieAuthenticationDefaults.AuthenticationType,
            CookieName = ".AuctionWebAuth",
            AuthenticationMode = AuthenticationMode.Active
        };
        app.UseCookieAuthentication(cookieOptions);
        app.MapSignalR(new HubConfiguration() {
            EnableDetailedErrors = true,
            EnableJSONP = true
        });
        GlobalHost.HubPipeline.RequireAuthentication();
        GlobalHost.DependencyResolver.Register(typeof(IUserIdProvider), () => new SignalRUserIdProvider());            
    }

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