Debug your services call using fiddler

add this into your web.config

 <system.net>
    <defaultProxy enabled="true" useDefaultCredentials="true">
      <proxy autoDetect="false" bypassonlocal="false" proxyaddress="http://127.0.0.1:6666" usesystemdefault="false">
      </proxy>
    </defaultProxy>
  </system.net>