Custom tool error: Failed to generate code for the service reference 'BaseInfoServices'. Please check other error and warning messages for details.

Question

when add service reference to Silverlight 4 Project, I got this error:Custom tool error: Failed to generate code for the service reference 'BaseInfoServices'. Please check other error and warning messages for details.

but when the endpoint "/ConfigurationService" have been removed, the service be added successful.

How to fixed the error?

code:<service behaviorConfiguration="ServiceBehaviorHCNService" 
           name="TMCSoft.HCN.Service.Implement.BaseInfoService">
    <host>
      <baseAddresses>
        <add baseAddress="net.tcp://localhost:4504" />
      </baseAddresses>
    </host>
    <endpoint address="" 
              binding="customBinding" 
              bindingConfiguration="CustomTcpBinding"  
              contract="TMCSoft.HCN.Service.Contract.IBaseInfoService" />
    <endpoint address="/ConfigurationService" 
              binding="customBinding" 
              bindingConfiguration="CustomTcpBinding"  
              contract="TMCSoft.HCN.Service.Contract.IConfigurationService" />
    <endpoint address="mex" 
              binding="customBinding" 
              bindingConfiguration="CustomMexTcpBinding" 
              contract="IMetadataExchange"/>
  </service>

Thanks.