ActionScript 3.0 :: Flash Error 2007 - Parameter Text Must Be Non Null

PHP Code:
var�variables:URLVariables�=�new�URLVariables();
var�varSend:URLRequest�=�new�URLRequest("counter.php");
varSend.method�=�URLRequestMethod.POST;
varSend.data�=�variables;
var�varLoader:URLLoader�=�new�URLLoader;
varLoader.dataFormat�=�URLLoaderDataFormat.VARIABLES;varLoader.addEventListener(Event.COMPLETE,�completeHandler);
variables.requestCode�= "homepage";
varLoader.load(varSend);
function completeHandler(event:Event):void{var�count =�event.target.data.returnBody;
gb_output.text�=�count;}