Image looks pixelated on Flash file

Hi All,

I have got a flipping image effect built with AS3, but somehow the images look pixelated and I am not sure where to change my code:
/* ***********************************************************************

import fl.transitions.easing.*;

import flashandmath.as3.TweenFlipCS4;
import flash.display.Bitmap;

var card1:TweenFlipCS4;

var card2:TweenFlipCS4;

var card3:TweenFlipCS4;

card1=new TweenFlipCS4(“http://arc.imshealth.com/gm/document-1.9.9242239/business_pic.png","http://arc.imshealth.com/gm/document-1.9.9242242/business_text.png”);

this.addChild(card1);

card2=new TweenFlipCS4(“http://arc.imshealth.com/gm/document-1.9.9242246/learmnindev.png","http://arc.imshealth.com/gm/document-1.9.9242247/learmnindevtext.png”);

this.addChild(card2);

setCardsPosAndProps();

function setCardsPosAndProps():void {

card1.x=30;
card1.y=42;
			   
card1.setFunc(Bounce.easeOut);
card1.setSpeed(2);






card2.x=105;
card2.y=42;
			   
card2.setFunc(Bounce.easeOut);
card2.setSpeed(2);

}

How do I need to change the code in order to get the images not pixealted?
Many thanks.