Problem using netTcp Binding in WCF

I am trying to create a simple wcf service that has a net.tcp endpoint.  My OS is Vista and I am hosting the service in IIS 7.  I have set my default website binding for net.tcp to 9200:* and added net.Tcp to my Enabled Protocols in my website hosting the service and the default website.  Here is my Config Values:

<system.serviceModel>
    <services>
      <service name="FirstWcfService.Service" behaviorConfiguration="ServiceBehavior">
        <!-- Service Endpoints -->
        <endpoint address="" binding="netTcpBinding" contract="FirstWcfService.IService"
            bindingConfiguration="tcpbinding"/>
        <endpoint address="mextcp" binding="mexTcpBinding" contract="IMetadataExchange"/>
        <endpoint address="" binding="wsHttpBinding" contract="FirstWcfService.IService"
            />
        <endpoint address="mexhttp" binding="mexHttpBinding" contract="IMetadataExchange"/>
      </service>
    </services>
    <behaviors>
      <serviceBehaviors>
        <behavior name="ServiceBehavior">
          <!-- To receive exception details in faults for debugging purposes,
               set the value below to true.  Set to false before deployment to avoid
               disclosing exception information -->
          <serviceMetadata httpGetEnabled="true" />
          <serviceDebug includeExceptionDetailInFaults="false"/>
        </behavior>
      </serviceBehaviors>
    </behaviors>
    <bindings>
      <netTcpBinding>
        <binding name="tcpbinding">
          <!--<security mode="None"></security>-->
          <security mode="None" />
        </binding>
      </netTcpBinding>
    </bindings>
  </system.serviceModel>

The wsHttp endpoint seems to work fine.  When I try to add a service reference through VS2008 to net.tcp://localhost:9200/FirstWcfServiceHost/Service.svc/mextcp (my net.tcp endpoint), I receive this error:

Metadata contains a reference that cannot be resolved: 'net.tcp://localhost:9200/FirstWcfServiceHost/Service.svc/mextcp'.
The message could not be dispatched because the service at the endpoint address 'net.tcp://localhost:9200/FirstWcfServiceHost/Service.svc/mextcp' is unavailable for the protocol of the address.
If the service is defined in the current solution, try building the solution and adding the service reference again.

Now if I add the service using the wshttp endpoint, it will add the net.tcp endpoint to my client app.  But if I try to use the net.tcp endpoint, I get this error:

{"The message could not be dispatched because the service at the endpoint address 'net.tcp://XXXXXXXXX:9200/FirstWcfServiceHost/Service.svc' is unavailable for the protocol of the address."}

Anyone have any suggestions?