Temat: Problem z kodem flash ( AS3). Proszę o pomoc.

Witam. Czy ktoś może mi pomóc i powiedzieć dlaczego menu działa
mi w pustym pliku fla.,a w pliku ze stroną już nie, i wyskakuje
błąd, że nie można uzyskać dostępu do właściwości lub
metody dla odniesienia do obiektu null.

import flash.display.MovieClip;

import flash.events.Event;

import flash.events.MouseEvent;

import flash.net.URLRequest;

import flash.net.navigateToURL;



import caurina.transitions.*;

import caurina.transitions.properties.ColorShortcuts;

ColorShortcuts.init();



var off:Object;



addButtons();



function addButtons():void

{



	var names:Array = new Array("O MNIE","PORTFOLIO","KONTAKT");



	for (var i:int = 0; i < 4; i++)

	{



		var myButton:MyButton = new MyButton();

		myButton.txt.tf.text = names[i];

		myButton.name = "b" + i;

		myButton.buttonMode = true;



		myButton.mouseChildren = false;



		myButton.addEventListener(MouseEvent.ROLL_OUT, bOut);

		myButton.addEventListener(MouseEvent.ROLL_OVER, bOver);

		myButton.addEventListener(MouseEvent.CLICK, bClick);



		myButton.x = 730.55 + (myButton.width * i);

		myButton.y = 374.35;



		this.addChild(myButton);

	}

}



function bOver(e:MouseEvent):void

{



	Tweener.addTween(e.target.bg, { y:0, _color:0x99A0A8, alpha:1, 	

time:1, transition:"easeOutExpo" } );



	Tweener.addTween(e.target.txt, { y:32.2, _color:0x000000, alpha:1, 	

time:0.0, transition:"linear" } );

}

function bOut(e:MouseEvent):void

{



	Tweener.addTween(e.target.bg, { y:-90, _color:0x0000000, 	

alpha:0.75, time:1, transition:"easeOutExpo" } );



	Tweener.addTween(e.target.txt, { y:32.2, _color:0xFFFFFF, alpha:1, 	

time:0.0, transition:"linear" } );

}

function bClick(e:MouseEvent):void

{

	for (var i:int = 0; i < this.numChildren; i++)

	{

		(this.getChildAt(i) as MyButton).x = 730.55 + (132 * i);

		(this.getChildAt(i) as MyButton).y = 5.35;

	}



	if (off != null)

	{



		off.buttonMode = true;

		off.addEventListener(MouseEvent.ROLL_OUT, bOut);

		off.addEventListener(MouseEvent.ROLL_OVER, bOver);

		off.addEventListener(MouseEvent.CLICK, bClick);

		off.dispatchEvent(new MouseEvent(MouseEvent.ROLL_OUT));

	}



	e.target.buttonMode = false;

	e.target.removeEventListener(MouseEvent.ROLL_OUT, bOut);

	e.target.removeEventListener(MouseEvent.ROLL_OVER, bOver);

	e.target.removeEventListener(MouseEvent.CLICK, bClick);

	off = e.target;



	switch (e.target.name)

	{

		case "b1" :

			trace;

			break;

		case "b2" :

			trace;

			break;

		default :

			trace;

			break;

	}



}