WCF Discovery .NET 4: Problem with config / programmatically definition

i have a discovery enabled WCF service and now i want to connect the client to it.

Problem: When i use the udp endpoint ( 1. ) and try to programmatically discover the service, it works... When i use the App.config approach ( 2. ) it does not ( Error: No endpoints discovered ).

To me it seems the "udp discovery result" of both of the solutions should be the same, but unfortunately it isn't...

1. Programmatically approach (works ):

Code:

        DiscoveryClient discClient = new DiscoveryClient("udpDiscoveryEndpoint");
        FindCriteria fCriteria = new FindCriteria(typeof(IAlarmServer));
        fCriteria.Duration = TimeSpan.FromSeconds(5);
        fCriteria.MaxResults = 1;
        FindResponse fResponse = discClient.Find(fCriteria);

        EndpointAddress address = fResponse.Endpoints[0].Address;
        Console.WriteLine("Address found: " + address.ToString());

Config:

<system.serviceModel>
  <client>
     <endpoint name="udpDiscoveryEndpoint" kind="udpDiscoveryEndpoint" />
  </client>
</system.serviceModel>

2. Approach with App.config and "integrated into endpoint" approach (does not work!):

Code:

        var Proxy = new AlarmServerClient("IAlarmServer"); // Default client generated by Visual Studio
        Proxy.SomeMethod(); // throw no endpoints discovered exception

Config:

<standardEndpoints>
  <dynamicEndpoint>
    <standardEndpoint name="discoveryDynamicEndpointConfiguration">
      <discoveryClientSettings>
        <findCriteria duration="00:00:05" maxResults="1">
          <types>
            <add name="AlarmServiceRef.IAlarmServer"/>
          </types>
        </findCriteria>
        <endpoint kind="udpDiscoveryEndpoint"/>
      </discoveryClientSettings>
    </s