Error #1009

[yusrom]

Здравствуйте! Пробежал по разным форумам в поисках решения этой проблемы - ошибка 1009. К сожалению ничего вразумительного не нашёл, кроме этого поста.
Вот мой код MainGame.as

package  
{
	//import caurina.transitions.Tweener;
 
	import flash.display.DisplayObject;
	import flash.display.MovieClip;
	import flash.display.SimpleButton;
	import flash.events.Event;
	import flash.events.MouseEvent;
	import flash.events.ProgressEvent;
 
	import flash.xml.XMLDocument;
	import flash.xml.XMLNode;
	import flash.net.URLLoader;
	import flash.net.URLRequest;
	import flash.display.Loader;
 
	public class MainGame extends MovieClip
	{
		private var sGame:DisplayObject; //бить
		private var bGame:DisplayObject; //ловить
		private var fGame:DisplayObject; //финал
		public  var tabl :DisplayObject; //таблица
 
		//xml
		var xmlData : XML = new XML();
		var loader : URLLoader = new URLLoader();
		public static var valuta : String;
		public static var priz : String;
		public static var note : String;
		public static var congratulation_text : String;
		public static var error : String;
		public static var prize : String;
		public static var congratulation : String;
		public static var send : String;
		public static var title : String;
		public static var timer : String;
		public static var confirm_txt : String;
		public static var prizeimg : String;
		public static var score : String;
		public static var urlsave : String;
		public static var coeff_one_point : String;
		public static var help1 : String;
		public static var help2 : String;
		public static var operators_label : Array;
		public static var operators_code  : Array;
 
 
		var loader_image : Loader;
		public var prize_img : MovieClip;
		public var prize2_text : MovieClip;
 
 
		public var prev_game : int = 0;
 
		public static var xml_loaded : Boolean = false;
 
 
 
 
		public function MainGame()
		{
			stop();
			stage.scaleMode = "noScale";
 
			start_btn.visible = false;
 
			loaderInfo.addEventListener(ProgressEvent.PROGRESS, onProgress, false, 0, true);
			loaderInfo.addEventListener(Event.COMPLETE,         onInit,     false, 0, true);
		}
 
		private function hndlOnLoadXML(e:Event):void 
		{
			e.target.removeEventListener(Event.COMPLETE, hndlOnLoadXML, false);
			xmlData = new XML(e.target.data);
			//trace(xmlData);
 
 
			valuta = "" + xmlData.itm.attribute("valuta");
			priz   = "" + xmlData.itm.attribute("priz");
			note   = "" + xmlData.itm.attribute("note");
			congratulation_text = "" + xmlData.itm.attribute("congratulation_text");
			error  = "" + xmlData.itm.attribute("error");
			prize  = "" + xmlData.itm.attribute("prize");
			congratulation = "" + xmlData.itm.attribute("congratulation");
			send   = "" + xmlData.itm.attribute("send");
			title  = "" + xmlData.itm.attribute("title");
			timer  = "" + xmlData.itm.attribute("timer");
			confirm_txt = "" + xmlData.itm.attribute("confirm_txt");
			prizeimg    = "" + xmlData.itm.attribute("prizeimg");
			score       = "" + xmlData.itm.attribute("score");
			urlsave     = "" + xmlData.itm.attribute("urlsave");
			coeff_one_point = "" + xmlData.itm.attribute("coeff_one_point");
			help1       = "" + String(xmlData.help1);
			help2       = "" + String(xmlData.help2);
 
			operators_label = new Array();
			operators_code  = new Array();
			for each(var operator in xmlData.operators.operator)
			{
				operators_label.push(operator);
				operators_code.push(operator.@code);
			}
 
 
			loader_image = new Loader();
			//
 
			loader_image.contentLoaderInfo.addEventListener(Event.COMPLETE, hndlOnLoadImage, false, 0, true);
 
			try
			{
				loader_image.load( new URLRequest(prizeimg));
			} 
			catch (error : Error) 
			{
				trace("Unable to load prize image" + error);
			}
 
 
			xml_loaded = true;
		}
	private function hndlOnLoadImage(e:Event):void 
		{
 
			loader_image.removeEventListener(Event.COMPLETE, hndlOnLoadImage);			
 
			prize_img.addChild(loader_image);
 
 
			prize2_text.x = -2;
			prize2_text.y = 15;
			prize2_text.txt.text = "" + prize;
			prize_img.addChild(prize2_text);
 
 
			start_btn.visible = true;
			//Tweener.addTween(bg, { alpha:0, time:0.5 } );
			bg.visible = true;
			start_btn.addEventListener(MouseEvent.CLICK, onClick, false, 0, true);
		}
 
		private function onProgress(e:ProgressEvent) : void
		{
			var loaded:Number = e.bytesLoaded / e.bytesTotal * 100;
			preload.gotoAndStop(Math.round(loaded));
		}
		private function onInit(e:Event):void
		{
			if (contains(preload))
				removeChild(preload);
			//
 
			prize_img   = new MovieClip();
			prize2_text = new prize2_txt();
 
			loader.addEventListener(Event.COMPLETE, hndlOnLoadXML, false, 0, true);
			try 
			{
				loader.load(new URLRequest("parameters.xml"));
			} 
			catch (error : Error) 
			{
				trace("Unable to load xml: " + error);
			}
		}
 
		private function onClick(e:MouseEvent):void
		{
			start_btn.removeEventListener(MouseEvent.CLICK, onClick);
 
			gotoAndStop(3);
 
			var blockGame:Class = loaderInfo.applicationDomain.getDefinition("BlockGame") as Class;
			bGame = (new blockGame()) as DisplayObject;
 
			var shotGame:Class = loaderInfo.applicationDomain.getDefinition("ShotGame") as Class;
			sGame = (new shotGame()) as DisplayObject;
 
			var finalGame:Class = loaderInfo.applicationDomain.getDefinition("FilnalScreen") as Class;
			fGame = (new finalGame()) as DisplayObject;
 
			var Tabl:Class = loaderInfo.applicationDomain.getDefinition("Tablo") as Class;
			tabl = (new Tabl()) as DisplayObject;
 
			switchToGame(1);
		}
 
		public function switchToGame(g:int):void
		{
			if (bGame != null && contains(bGame))
				removeChild(bGame);
			//
			if (sGame != null && contains(sGame))
				removeChild(sGame);
			//
			if (fGame != null && contains(fGame))
			{
				tablo.reset();
				update();
 
				removeChild(fGame);
			}
			//
 
 
			Model.shots = 0;
			tabl.visible = true;
 
			var game:DisplayObject;
			switch(g)
			{
				case 1: //удар
					//
					game = sGame;
					tabl.scaleX = tabl.scaleY = 1.0;
					tabl.x = 345;
					tabl.y =  43;
					tablo.keeperGame = false;
					break;
				//
				case 2: //ловля
					//
					game = bGame;
					tabl.scaleX = tabl.scaleY = 0.64;
					tabl.x = 408;
					tabl.y =  73;
					tablo.keeperGame = true;
					break;
				//
				case 3: //финал
					//
					Model.totalShots = 0;
 
					game = fGame;
					tabl.visible = false;
					tablo.reset();
					break;
				//
			}
 
 
			if (g == prev_game + 1)
				Model.is_read_help = true;
			//
 
			addChildAt(game, 0);
			addChild(tabl);
 
			prize_img.x = 1024 - 225;
			prize_img.y = 15;
			addChild(prize_img);
 
			if (g == 3)
			{
				if(contains(prize_img))
					removeChild(prize_img);
				//
			}
 
 
			prev_game = g;
			if (prev_game == 3)
				prev_game = 0;
			//
 
			//update();
		}
 
		public function update():void
		{
			tablo.update();
		}
 
		public function get tablo() : Tablo
		{
			return tabl as Tablo;
		}
 
	}
 
}

При компиляции выводится сообщение об ошибке
TypeError: Error #1009: Не удается вызвать свойство или метод со ссылкой на объект "null".
at MainGame/hndlOnLoadImage()
А также не отображается кнопка start_btn.
Как я понял ошибка либо в функции hndlOnLoadImage() либо в соседней на несколько строк выше.
Подскажите, пожалуйста, решение проблемы!