How to reverse geocode a location ?

<?xml version="1.0" encoding="utf-8"?>
<mx:Application
 xmlns:mx="http://www.adobe.com/2006/mxml"
 xmlns:map="com.esri.aws.awx.map.*"
 xmlns:framework="com.esri.aws.osgi.framework.*"
 xmlns:services="com.esri.aws.services.*"
 xmlns:awx="com.esri.aws.awx.*"
 implements="mx.rpc.IResponder"
 initialize="initializeHandler()"
 layout="absolute">
  <mx:Script><![CDATA[
      import mx.logging.targets.TraceTarget;
      import mx.logging.Log;
      import com.esri.aws.services.GeocodeCandidate;
      import com.esri.aws.awx.map.handlers.ReverseGeocodeMouseHandler;
      import com.esri.aws.services.FindActivator;
      import com.esri.aws.services.GeocodeInfo;
      import com.esri.awx.RevGeoMouseHandler;
      
      private function initializeHandler() : void
      {
        map.mouseHandler = new ReverseGeocodeMouseHandler(this);    
      }
      
      public function result(data:Object):void
      {
        var geocodeInfo:GeocodeInfo = data as GeocodeInfo;
        for each ( var candidate : GeocodeCandidate in geocodeInfo.candidates)
        {
          trace( candidate.desc1 );
        }
      }
      
      public function fault(info:Object):void
      {
        trace( info);
      }
    ]]></mx:Script>
  <framework:Framework apiKey="19640523">
  <services:FindActivator/>
  </framework:Framework>
  <map:Map id="map" centerLon="-96.8577" centerLat="38.9762" scale="26000000"/>
</mx:Application>