Service Not Processing Messages on the Subscription

I was following the example on the MSDB BLOG using-service-bus-topics-and-subscriptions-with-wcf.aspx.

The client is able to send message to topic1.  The service1 and service2 are working somewhat, I think.  Because, when the services start the subscriptions sub1 and sub2 are created.  But, the messages that are sent are sitting in sub1 and sub2 and not being consumed by the service. Below is what the web.config look like...  Any suggestions on how to trouble shoot why the service1 and service2 are unable to receive messages?

        <behavior name="securityBehavior">
          <transportClientEndpointBehavior>
            <tokenProvider>
              <windowsAuthentication>
                <stsUris>
                  <stsUri value="https://luhuahsi-sb:9355/PubSubExample " />
                </stsUris>
              </windowsAuthentication>
            </tokenProvider>
...

    <services>
      <service name="ServiceBusPubSub.ServiceTwo.Service2">
        <endpoint name="Service2"
                  listenUri="sb://LUHUAHSI-SB/PubSubExample/topic1/subscriptions/sub2"
                  address="sb://LUHUAHSI-SB/PubSubExample/topic1"
                  binding="netMessagingBinding"
                  bindingConfiguration="messagingBinding"
                  contract="ServiceBusPubSub.Contracts.IAccountEventNotification"
                  behaviorConfiguration="securityBehavior" />
      </service>