problem with passing data from flash(actionscript 3) to asp.net

[chaocanha]

i have code in flash (as3):

function xacnhanclick(evt:Event):void
          {
               
               sendxml();
          }
          
          public function sendxml():void
          {
               
               var req:URLRequest = new URLRequest("Chonphong.aspx");
               var a:URLVariables=new URLVariables();
               a.text="abc";
               
               
              req.method = URLRequestMethod.POST;
              req.contentType = "text/xml";
              req.data =a;
               
              sendToURL(req);
               trace(req.data);
          }

how do i get data from this httpPost request in asp.net?
this is my code
http://www.mediafire.com/download.php?sqg4z5her5a5jl8