SignalR/Silverlight: Start must be called before data can be sent.

SignalR/Silverlight: Start must be called before data can be sent.

I have the following client code (Silverlight 4):

HubConnection hubConnection; IHubProxy alertHub;   hubConnection = new HubConnection("http://localhost:59805/"); alertHub = hubConnection.CreateProxy("alertservice");  Task startTask = hubConnection.Start().ContinueWith(task => {     if (task.IsFaulted)     {      }      alertHub.Invoke("NewMessage", "asdf", "jkl").Wait(); }); 

And the following server code (hosted in ASP.Net web project):

[HubName("alertservice")] public class AlertServiceHub : Hub {     public void NewMessage(string userName, string messageText)     {         Clients.AddMessage(userName, messageText);     } } 

On the alertHub.Invoke method, I get the error "Start must be called before data can be sent."

The strange thing is, when I check Fiddler on the connection attempt, the following is returned (note "Connection: Close"):

HTTP/1.1 200 OK Server: ASP.NET Development Server/10.0.0.0 Date: Tue, 14 Aug 2012 15:11:29 GMT X-AspNet-Version: 4.0.30319 Transfer-Encoding: chunked Cache-Control: no-cache Pragma: no-cache Expires: -1 Content-Type: text/event-stream Connection: Close 

Answers & Comments...

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