如何通过AsyncToken处理远程方法调用？

<?xml version=\"1.0\" encoding=\"utf-8\"?>
<s:Application xmlns:fx=\"http://ns.adobe.com/mxml/2009\" 
               xmlns:s=\"library://ns.adobe.com/flex/spark\" 
               xmlns:mx=\"library://ns.adobe.com/flex/mx\" minWidth=\"955\" minHeight=\"600\">

    <fx:Script>
        <![CDATA[
            import argoseye.main.Golem;

            import mx.collections.ArrayCollection;
            import mx.rpc.AsyncResponder;
            import mx.rpc.AsyncToken;
            import mx.rpc.Responder;
            import mx.rpc.events.FaultEvent;
            import mx.rpc.events.InvokeEvent;
            import mx.rpc.events.ResultEvent;
            import mx.rpc.remoting.RemoteObject;
            protected function button1_clickHandler(event:MouseEvent):void
            {
                var ro:RemoteObject = new RemoteObject(\"destination\");
                ro.endpoint = \"http://Jesus/blazeds/messagebroker/amf\";
                ro.addEventListener(InvokeEvent.INVOKE,onInvoke);

                var token:AsyncToken = new AsyncToken();
                token.addResponder(new AsyncResponder(onResult,onFault));

                token = ro.getCells();
                textfeld.text = textfeld.text + \"Clickhandler called .... \\n\";

            }

            public function onResult(event:ResultEvent,token:Object):void {
                textfeld.text = textfeld.text + \"Resulthandler called .... \\n\";
                var cellList:ArrayCollection = event.result as ArrayCollection;

            }

            public function onFault(event:FaultEvent,token:Object):void
            {
                textfeld.text = textfeld.text + \"Faulthandler called .... \\n\";
            }

            public function onInvoke(event:InvokeEvent):void {
                textfeld.text = textfeld.text + \"Invokehandler called .... \\n\";
            }
        ]]>
    </fx:Script>

    <fx:Declarations>
        <!-- Place non-visual elements (e.g., services, value objects) here -->
    </fx:Declarations>
    <s:Button x=\"1093\" y=\"575\" label=\"Button\" click=\"button1_clickHandler(event)\"/>
    <s:TextArea x=\"1022\" y=\"183\" id=\"textfeld\"/>
</s:Application>

package argoseye.main

import mx.collections.ArrayCollection;
import mx.messaging.ChannelSet;
import mx.messaging.channels.AMFChannel;
import mx.rpc.AsyncResponder;
import mx.rpc.AsyncToken;
import mx.rpc.events.FaultEvent;
import mx.rpc.events.ResultEvent;
import mx.rpc.remoting.RemoteObject;

public class Schem
{
    public var info:String=\"\";


    public function Schem()
    {       
    }

    public function loadCurrentSchem():void
    {
        var ro:RemoteObject = new RemoteObject(\"Hibernatetest\");
        ro.endpoint = \"http://jesus/blazeds/messagebroker/amf\";

        var token:AsyncToken = ro.getCells();
        token.addResponder(new AsyncResponder(onResult,onFault));

        info = info + \"Loader Called ...\";


    }

    public function onResult(event:ResultEvent,token:Object):void {
        var cellList:ArrayCollection = event.result as ArrayCollection;
        info = info + \"Resulthandler Called\";

    }

    public function onFault(event:FaultEvent,token:Object):void
    {

    }
    //Eventhandlers


    //Getters, Setters


}