tom variabel

Hej
Jeg har et problem håber i kan hjælpe.

Jeg har dette kode i frame 1


var currentTagString = "";
var nameString = "";



function getNameFromTag():{
    var variables:URLVariables = new URLVariables("tag="+currentTagString);
    var request:URLRequest = new URLRequest();
    request.url = "http://www.iolite.dk/getnamefromtag.php";
    request.method = URLRequestMethod.POST;
    request.data = variables;
    var loader:URLLoader = new URLLoader();
    loader.dataFormat = URLLoaderDataFormat.VARIABLES;
    loader.addEventListener(Event.COMPLETE, completeHandler);
    try
    {
        trace("trying..")
        loader.load(request);
    }
    catch (error:Error)
    {
        trace("Unable to load URL");
    }

}
function completeHandler(event:Event):void {
    trace("complete");
    var loader2:URLLoader = URLLoader(event.target);
    loader2.dataFormat = URLLoaderDataFormat.VARIABLES;
    var variables2:URLVariables = new URLVariables(loader2.data);
    var temp:String = String(variables2);
    trace(temp); // just to check the "raw" data   
    var temp2 = unescape(temp);
    var temp3 = unescape(temp2);
    nameString = temp3.substring(4,temp.length);
    trace("Hej "+ nameString);

}

function reportKeyDown(event:KeyboardEvent):void
{
    var keyCode = event.keyCode;
    if ((keyCode >= 48 && keyCode <= 57)||
        (keyCode >= 65 && keyCode <= 90)) { // numbers or letters
        currentTagString += String.fromCharCode(keyCode);
    }
    if(keyCode == 13){ //enter pressed
        trace("tag: "+currentTagString);
        getNameFromTag();
        //mySQLTest();
        //ASQL();
       
        gotoAndPlay(91);
        currentTagString = "";
       
    }
}
stage.addEventListener(KeyboardEvent.KEY_DOWN, reportKeyDown);

Jeg skal så senere i frame 91 bruge variablen nameString som skal vise indholdet af denne i et tekstfield, frame 91 kode ser sådan ud:

var writingCompleted:TextField = new TextField;
writingCompleted.autoSize = "center";
writingCompleted.x =200;
writingCompleted.y= 200;
writingCompleted.text = nameString;
addChild(writingCompleted);
 
Men indholdet af nameString er tomt, hvorfor det?

jeg bruger as3