Probléme code AS3, Faire rebondir un mc dans la scéne

conteneurall.addEventListener(Event.ENTER_FRAME,tourne);
function tourne(e:Event) {
	
	var horizon= new Tween (conteneurall,"x",Elastic.easeIn,50,400,3,true);
	horizon.addEventListener(TweenEvent.MOTION_FINISH, onFinish1);
		function onFinish1(e:TweenEvent):void {
			horizon.looping();
		}
	
	if (conteneurall.hitTestObject(bord)) {
		var vertical= new Tween (conteneurall,"y",Bounce.easeOut,300,40,2,true);
		vertical.addEventListener(TweenEvent.MOTION_FINISH, onFinish2);
		function onFinish2(e:TweenEvent):void {
			vertical.looping();
		}
		
		conteneurall.removeEventListener(Event.ENTER_FRAME,tourne);}}

if (sensX == gauche") x -= 5;

else if (sensX == "droite") x += 5;

//Rebond 

//Vitesse initiale
var xspeed:Number = 0;
var yspeed:Number = 0;

//Coeff de vitesse
var speed:Number = 1;

//Detecter où est le curseur
var dessusEqui:Number = 0;
var dessusTerreSing:Number = 0;
var dessusTerreMachin:Number = 0;

addEventListener(Event.ENTER_FRAME,ballmouvement);

function ballmouvement(e:Event):void {

	speed=speed+0.05;
	if (speed>=24) {

		removeEventListener("enterFrame", ballmouvement);
			//Résultats:
	if (compteur<=700) {
		addChild(loos);
	}
	if (compteur>700) {
		addChild(gg);
	}
	}
	if (dessusEqui== 1) {
		//Vitesse up, points up
		compteur=compteur+Math.round(speed);
		hit.text= "Score: "+compteur ;
	}
	if (dessusTerreMachin== 1||dessusTerreSing==1) {
		//Points enlevés: /2
		compteur=compteur-Math.round(speed/2);
		hit.text= "Score: "+compteur ;
	}
	if (xspeed < speed && xspeed >= 0) {
		xspeed += 1;

	}
	if (xspeed > -speed && xspeed < 0) {
		xspeed -= 1;

	}
	if (yspeed < speed && yspeed >= 0) {
		yspeed += 1;
	}
	if (yspeed > -speed && yspeed < 0) {
		yspeed -= 1;
	}
	conteneurall.x += xspeed;
	conteneurall.y += yspeed;

	if (conteneurall.y>=665&&yspeed>0) {
		//Touche le bas
		yspeed = -yspeed;//Change dir u
	}
	if (conteneurall.y<=170&&yspeed<0) {
		//Touche le haut
		yspeed = -yspeed;//Change dir y
	}
	if (conteneurall.x>=690&&xspeed>0) {
		//Touche la droite
		xspeed = -xspeed;//Change dir x
	}
	if (conteneurall.x<=0&&xspeed<0) {
		//Touche la gauche
		xspeed = -xspeed;//Change dir x
	}
}
//Fin rebond