A very simple question but it makes me very frustrated

In .Net4, the <service/> element is optional, it will add the default endpoint.

A custom said that he always encounter an error "Can't find endpoint"

  <system.serviceModel>
    <services>
      <service name="WcfService1.Service1" behaviorConfiguration="WcfService1.Service1Behavior">
        <!-- Service Endpoints -->
        
        <endpoint address="" binding="webHttpBinding" contract="WcfService1.IService1">
          <!-- 
              Upon deployment, the following identity element should be removed or replaced to reflect the 
              identity under which the deployed service runs.  If removed, WCF will infer an appropriate identity 
              automatically.
          -->
          <identity>
            <dns value="localhost"/>
          </identity>
        </endpoint>
        <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/>
      </service>
    </services>
    <behaviors>
      <serviceBehaviors>
        <behavior name="WcfService1.Service1Behavior">
          <!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment -->
          <serviceMetadata httpGetEnabled="true"/>
          <!-- 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 -->
          <serviceDebug includeExceptionDetailInFaults="false"/>
        </behavior>
      </serviceBehaviors>
    </behaviors>
  </system.serviceModel>

The problem here is that he use a "webHttpBinding",  when I test the service by suing WCFClientTest tool. the reslult is always empty. Because of this, I suspect the service name don't work here, makes me very unhappy.