Hi there,
I have a client console app talking to a WCF service and I get the following error: "The server did not provide a meaningful reply; this might be caused by a contract mismatch, a premature session shutdown or an internal server error."

I think it's becuase of a contract mismatch but i can't figure out why. The service runs just fine by itself and the 2 parts were working together until i added the impersonation code.

Can anyone see what is wrong?

Here is the client, all done in code:

NetTcpBinding binding = new NetTcpBinding();
binding.Security.Mode = SecurityMode.Message;
binding.Security.Message.ClientCredentialType = MessageCredentialType.Windows;

EndpointAddress endPoint = new EndpointAddress(new Uri("net.tcp://serverName:9990/TestService1"));
ChannelFactory<IService1> channel = new ChannelFactory<IService1>(binding, endPoint);
channel.Credentials.Windows.AllowedImpersonationLevel = TokenImpersonationLevel.Impersonation;
IService1 service = channel.CreateChannel();

And here is the config file of the WCF service:

<configuration>
  <system.serviceModel>
    <bindings>
      <netTcpBinding>
        <binding name="MyBinding">
          <security mode="Message">
            <transport clientCredentialType="Windows"/>
            <message clientCredentialType="Windows" />
          </security>
        </binding>
      </netTcpBinding>
    </bindings>
    <behaviors>
      <serviceBehaviors>
        <behavior name="WCFTest.ConsoleHost2.Service1Behavior">
          <serviceMetadata httpGetEnabled="true"  />
          <serviceDebug includeExceptionDetailInFaults="true" />
          <serviceAuthorization impersonateCallerForAllOperations="true" />
        </behavior>
      </serviceBehaviors>
    </behaviors>
    <services>
      <service behaviorConfiguration="WCFTest.ConsoleHost2.Service1Behavior"
          name="WCFTest.ConsoleHost2.Service1">
        <endpoint address="" binding="wsHttpBinding" contract="WCFTest.ConsoleHost2.IService1">
          <identity>
            <dns value="" />
          </identity>
        </endpoint>
        <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
        <endpoint binding="netTcpBinding" bindingConfiguration="MyBinding"
            contract="WCFTest.ConsoleHost2.IService1" />
        <host>
          <baseAddresses>
            <add baseAddress="http://serverName:9999/TestService1/" />
            <add baseAddress="net.tcp://serverName:9990/TestService1/" />
          </baseAddresses>
        </host>
      </service>
    </services>
  </system.serviceModel>
</configuration>