WCF, having trouble running from host.

I made a simple WCF service library. It works in localhost with the development server. I have tried many diff configs with a runtime error or 500 internet error. Some advice or corrections?
 
Environment: VS 2010, WCF Service Library, Hosting site - cloud server(Gear Host), I use ASPX for web development.
wsHttpBinding,
 
Here is the web.config: based on the configurations from the app.config file.

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <!-- When deploying the service library project, the content of the config file must be added to the host's 
  app.config file. System.Configuration does not support config files for libraries. -->
  <system.serviceModel>
    <bindings>
      <wsHttpBinding>
        <binding name="wsServBind" />
      </wsHttpBinding>
    </bindings>
    <services>
      <service name="WebServEnc.ServLib.Service">
        <endpoint address="~/WebServEnc.ServLib.Service" binding="wsHttpBinding"
          bindingConfiguration="wsServBind" name="Default" contract="WebServEnc.IServ">
          <identity>
            <dns value="" />
          </identity>
        </endpoint>
        <endpoint address="mex" binding="mexHttpBinding" name="serv"
          contract="IMetadataExchange">
          <identity>
            <dns value="http://mysite.com/" />
          </identity>
        </endpoint>
      </service>
    </services>
    <behaviors>
      <serviceBehaviors>
        <behavior>
          <!-- 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>
 
</configuration>