Flash CS3 Gaming Help Needed Please!!!

hi
im creating a brick builder game

ive got the paddle and ball moving now i just want the ball to bounce off the paddle hit the brick and then the brick disappears, i am using document classes, im just stuck on this bit, any help would be appreciated, please need your help lol

package {
	import flash.display.*;
	import flash.events.*;
	import flash.text.*;
	import flash.ui.Mouse;
	public class Breakout extends Sprite {
		var ball_mc:Ball;
		var xVel:int=10;
		var yVel:int=10;

		var paddle_mc:Paddle;

		function Breakout() {
			ball_mc=new Ball();
			ball_mc.x=100;
			ball_mc.y=100;
			this.addChild(ball_mc);

			paddle_mc=new Paddle();
			paddle_mc.x=250;
			paddle_mc.y=380;//this positions the paddle on the screen, currently at the bottom of the screen//
			this.addChild(paddle_mc);
			paddle_mc.init();
			start_btn.addEventListener(MouseEvent.CLICK,startGame);
			this.addEventListener(Event.ENTER_FRAME, updateGame);
		}
		function startGame(evt:MouseEvent) {
			this.addEventListener(Event.ENTER_FRAME,moveBall);
			start_btn.visible=false;
		}
		private function updateGame(e:Event) {
			paddle_mc.moveIt();
		}
		function moveBall(e:Event) {
			ball_mc.y=ball_mc.y-yVel;
			ball_mc.x=ball_mc.x-xVel;
			if (ball_mc.x>this.stage.stageWidth || ball_mc.x<0) {
				xVel=xVel*-1;
			}
			if (ball_mc.y>this.stage.stageHeight || ball_mc.y<0) {
				yVel=yVel*-1;
			}
		}
		//Hitting the paddle
		if (Ball.hitTestObject(Paddle)) {
			calcBallAngle();
		}
	}
}

Code (markup):

package {
	import flash.display.MovieClip;
	import flash.events.*;
	import flash.events.KeyboardEvent;

	public class Paddle extends MovieClip {
		var left:Boolean;					
		var right:Boolean;					

		function Paddle() {
			this.stop();
		}
		function init() {
			this.stage.addEventListener(KeyboardEvent.KEY_DOWN,keyDownHandler);	
			this.stage.addEventListener(KeyboardEvent.KEY_UP,keyUpHandler);		
		}

		private function keyDownHandler(e:KeyboardEvent):void {
			if (e.keyCode==37) {			
				left=true;
			}
			if (e.keyCode==39) {			
				right=true;
			}
		}
		private function keyUpHandler(e:KeyboardEvent):void {
			if (e.keyCode==37) {			
				left=false;
			}
			if (e.keyCode==39) {			
				right=false;
			}
		}

		function moveIt() {
			if (left==true) {				
				this.x-=10;
			}
			if (right==true) {				
				this.x+=10;
			}
			if (this.x <= 48) {				
				this.x+=10;
			}
			if (this.x >= 500) {			
				this.x-=10;
			}
		}
	}
}

Code (markup):

my two class files, your help would be much appreciated thank you