Récupérer des variables en AS3 vers PHP

pseudo.text = pass.text = "";

connection.addEventListener(MouseEvent.CLICK, submit);

 
var timer:Timer;
var var_load:URLLoader = new URLLoader;
var URL_request:URLRequest = new URLRequest( "traitement.php" );
URL_request.method = URLRequestMethod.POST;

function submit(e:MouseEvent):void
{
    if( pseudo.text == "" || pass.text == "" )
    {
        message_status.text = "Merci de remplir tous les champs.";
    }
    
    else
    {
        message_status.text = "Envoi en cours...";
        
        var email_data:String = "name=" + pseudo.text
                       + "&pass=" + pass.text
                       
                       
        var URL_vars:URLVariables = new URLVariables(email_data);
        URL_vars.dataFormat = URLLoaderDataFormat.TEXT;
                
        URL_request.data = URL_vars;
        var_load.load( URL_request );
        var_load.addEventListener(Event.COMPLETE, receive_response );
    }
}


function receive_response(e:Event):void
{
    var loader:URLLoader = URLLoader(e.target);
    var email_status = new URLVariables(loader.data).success;
    if( email_status == "yes" )
    {
        message_status.text = "Votre message a correctement été envoyé.";
        timer = new Timer(500);
        timer.addEventListener(TimerEvent.TIMER, on_timer);
        timer.start();
    }
    else
    {
        message_status.text = "Erreur. Le message n'a pas pu être envoyé.";
    }
}

function on_timer(e:TimerEvent):void 
{
    if( timer.currentCount >= 10 )
    {
        pseudo.text = pass.text  = "";
        timer.removeEventListener(TimerEvent.TIMER, on_timer);
    }
}