Enable WCF traces

gistfile1.xml

<system.diagnostics>
      <sources>
            <source name="System.ServiceModel" 
                    switchValue="Information, ActivityTracing"
                    propagateActivity="true">
            <listeners>
               <add name="traceListener" 
                   type="System.Diagnostics.XmlWriterTraceListener" 
                   initializeData= "S:\Services\gaiaservices.canaldoimovel.com.br\logs\Traces.svclog" />
            </listeners>
         </source>
      </sources>
   </system.diagnostics>