Executer plusieurs POST method pour un URLLoader

J'ai trouver voici toujours la solution :
il fallait juste mettre le URLLoader en global et rappeler le URLLoader.Load seulement quand le premier appel de URLLoader.Load à répondu...
Code:
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<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2007/07/28/downloading-files-in-flex-using-the-filereference-class/ -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
        layout="vertical"
        verticalAlign="middle"
        backgroundColor="white" applicationComplete="onAppComplete()">   
 
    <mx:Script>
        <![CDATA[
        	import mx.utils.URLUtil;
        	import mx.rpc.events.FaultEvent;
        	import mx.rpc.events.ResultEvent;
        	import mx.controls.Text;
        	import mx.controls.Label;
            import mx.controls.Alert;
            import mx.collections.ArrayCollection;
            import flash.net.FileReference;   
 
			[Bindable]
            private var listTable:ArrayCollection = new ArrayCollection();
 
	        private var txtField:TextField;  
	        private var HTMLData:String;  
	        private var myHTMLFile:URLLoader;  
 
 
	        private var maPage:Sitepage;
 
	        public function onAppComplete():void
	        {
	        	myHTMLFile = new URLLoader();
	        	myHTMLFile.addEventListener(Event.COMPLETE, onLoadHTML, false, 0, true);  
	            myHTMLFile.addEventListener(IOErrorEvent.IO_ERROR, ioError, false, 0, true);
	        }
 
	        public function loadHTML():void 
	        {  
				 var myUrlRequest:URLRequest = new URLRequest(txtUrl.text)
 
				 var variables:URLVariables = new URLVariables();
			     variables.__EVENTTARGET = "ctl00$ContentPlaceHolder1$lnkNext";
			     variables.__VIEWSTATE = "/wEPBSBiOTdjZDM0MmJjN2Q0NzQ0ODU5YjcyZDM3ODE5NDQ2ZmQRBt89oufrfa5LvMVGJhmKGC7C2A==";
			     variables.ctl00$ContentPlaceHolder1$ddlPageSize = "10";
 
				 myUrlRequest.data = variables;
			     myUrlRequest.method = URLRequestMethod.POST;
 
				 // myUrlRequest.method = "javascript:__doPostBack('ctl00$ContentPlaceHolder1$lnkNext','')";
 
	             myHTMLFile.load(myUrlRequest);
	             //myHTMLFile.load(myUrlRequest);
	             //myHTMLFile.close();
	        }  
 
	        private function onLoadHTML(e:Event):void  
	        {  
	             HTMLData = e.target.data;  
	             initTextField();  
	        }  
 
	        private function initTextField():void  
	        {  
	         	 Alert.show("Table List Loaded");
 
	   			 txt.text = HTMLData;
				 //myHTMLFile.removeEventListener(Event.COMPLETE, onLoadHTML);  
	             //myHTMLFile.removeEventListener(IOErrorEvent.IO_ERROR, ioError);  
	        }  
 
	        private function ioError(e:IOErrorEvent):void  
	        {  
	         	 Alert.show(e.text);
	             trace ("Error: File " + e.text + " could not be loaded");  
	        }
 
 
        ]]>
    </mx:Script>   
 
    <mx:HBox id="myHBox">
    	<mx:Label text="Url : "/>
        <mx:TextInput id="txtUrl" width="350">
            <mx:text></mx:text>
        </mx:TextInput>
        <mx:Button click="loadHTML()" label="Load Tables" ></mx:Button>
 
        <mx:ComboBox id="cmbBox" dataProvider="{listTable}"></mx:ComboBox>
    </mx:HBox>
    <mx:VBox id="myHBoxBottom" height="100%" width="100%">
   		<mx:TextArea width="100%" height="50%" id="txt" />
   		<mx:TextArea width="100%" height="50%" id="txtRow" />
    </mx:VBox>
</mx:Application>