Загрузка ByteArray на сервер WAMP

[BlackValmont]

package script{
    import flash.display.Sprite;
    import flash.display.StageAlign;
    import flash.display.StageScaleMode;
	import flash.utils.ByteArray;
	import flash.display.*;
    import flash.events.*;
    import flash.media.Camera;
    import flash.media.Video;
	import flash.net.*; 
 
	import com.adobe.images.PNGEncoder;
 
    public class CameraExample2 extends Sprite {
        private var video:Video;
 
        public function CameraExample2() {
            stage.scaleMode = StageScaleMode.NO_SCALE;
            stage.align = StageAlign.TOP_LEFT;
 
			var camera:Camera = Camera.getCamera();
 
            if (camera != null) {
                camera.addEventListener(ActivityEvent.ACTIVITY, activityHandler);
                video = new Video(camera.width * 2, camera.height * 2);
                video.attachCamera(camera);
				addChild(video);
				stage.addEventListener(MouseEvent.MOUSE_DOWN,saveStill);
            } else {
                trace("You need a camera.");
            }
        }
		public function saveStill(e:MouseEvent):void{
			var bmd:BitmapData = new BitmapData(320,240);
			bmd.draw(video);
			var ba:ByteArray = PNGEncoder.encode(bmd);
			var request:URLRequest = new URLRequest ('http://localhost/client/sendAndLoad/savePngFromCam.php');
			var loader: URLLoader = new URLLoader();
			var variables:URLVariables = new URLVariables();
			var header:URLRequestHeader = new URLRequestHeader("Content-type", "application/octet-stream");
    		request.requestHeaders.push(header);
			request.method = URLRequestMethod.POST;
			variables.ba = ba;
			request.data = variables;//variables;
    		loader.load(request);
			loader.addEventListener(IOErrorEvent.IO_ERROR, errorHandler);
			loader.addEventListener(Event.COMPLETE, loaderCompleteHandler);
		}
        private function activityHandler(event:ActivityEvent):void {
            //trace("activityHandler: " + event);
        }
		private function errorHandler(e:IOErrorEvent){
			trace("not Connected");
		}
		private function loaderCompleteHandler(e:Event){
			trace("Loader Comlite...");
		}
    }
}

и обработка PHP

PHP код:

<? 
    $byteArray = $_POST['ba'];    
    $fp = fopen($_SERVER['DOCUMENT_ROOT'] . "/upload/tetttsss.png","wb");
    fwrite($fp, $byteArray);    
    fclose($fp);
?>

PHP создает файлик размером 0 байт;

Перепробовал кучу различных вариантов и не один не работает. Помогите плз