HTTPRelayBinding ContractFilter mismatch at the EndpointDispatcher issue

Q1:> How to check the service can receive messages from the client?

Q2:> How to debug and ratify "ContractFilter mismatch at the EndpointDispatcher" error message?

We have created a simple windows console service application using Azure Service bus relay, hosted it in azure service bus namespace. We want WP app to access this service. When we try to access this service using WP, we get "ContractFilter mismatch" error message. Complete error message listed below.

We can access this service using normal desktop client application by using service bus namespace. But since, service bus namespace is not there for WP, we are using REST api's for WP app.

I am sharing the code for both Service and WP app. It would be great if you could have a look at it and help me to move forward.

Service side code:

namespace ConsoleApplication1
{
    [ServiceContract(Namespace = "https://psappservicenamespace.servicebus.windows.net")]
    interface IProblemSolver
    {
        [OperationContract]
        [WebGet(UriTemplate = "/HelloWorld")]
        string HelloWorld();
    }

    [ServiceBehavior(AddressFilterMode = AddressFilterMode.Any)]
    class ProblemSolver : IProblemSolver
    {
        public string HelloWorld()
        {
            return "Hello World!";
        }       
    }


    class Program
    {
       static void Main(string[] args)
        {
            var sh = new ServiceHost(typeof(ProblemSolver),
                    new Uri("http://psappservicenamespace.servicebus.windows.net/solver"));
            sh.Description.Behaviors.Add(
                 new ServiceMetadataBehavior
                 {
                     HttpGetEnabled = true,
                     HttpGetUrl = new Uri("http://localhost:8088/solver")
                 });

            var se = sh.AddServiceEndpoint(typeof(IProblemSolver),
                 new BasicHttpRelayBinding(EndToEndBasicHttpSecurityMode.None,
                                           RelayClientAuthenticationType.None), String.Empty);

            var endpointBehavior = new TransportClientEndpointBehavior(
                   TokenProvider.CreateSharedSecretTokenProvider("owner", "**ACCESS*KEY**"));

            se.Behaviors.Add(endpointBehavior);
            sh.Open();
            Console.WriteLine("Service is up. Press any key to close the service.");
            Console.ReadLine();
            sh.Close();     
        }
    }
}

Windows Phone App: