C# – arterySignalR/ping MVC4 was not found

I'm using MVC4, C#, Entity framework with repository pattern and I installed the Elmah nuget package. I have set the Elmah to send email when application error appear and since that I receive this:

System.Web.HttpException: The controller for path '/3582be999d2646eca85b82b5302fc0af/arterySignalR/ping' was not found or does not implement IController.

Generated: Tue, 05 Nov 2013 14:43:21 GMT System.Web.HttpException
(0x80004005): The controller for path
'/3582be999d2646eca85b82b5302fc0af/arterySignalR/ping' was not found
or does not implement IController. at
System.Web.Mvc.DefaultControllerFactory.GetControllerInstance(RequestContext
requestContext, Type controllerType) at
System.Web.Mvc.DefaultControllerFactory.CreateController(RequestContext
requestContext, String controllerName) at
System.Web.Mvc.MvcHandler.ProcessRequestInit(HttpContextBase
httpContext, IController& controller, IControllerFactory& factory)
at System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContextBase
httpContext, AsyncCallback callback, Object state) at
System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContext httpContext,
AsyncCallback callback, Object state) at
System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.BeginProcessRequest(HttpContext
context, AsyncCallback cb, Object extraData) at
System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step,
Boolean& completedSynchronously)

I dont know why I receive that error, I even don't know what arterySignalR/ping is and I want to know if someone of you know the solution to solve that.

Thank you very much,

Karine