No compiler errors...nothing on stage!

programming flash
1

well i have this code as compiled class


package
{
	import flash.display.Sprite;
	import flash.display.StageAlign;
	import flash.display.StageScaleMode;
	import flash.events.Event;
	public class Bouncing extends Sprite
	{
		private var ball:Ball;
		private var vx:Number;
		private var vy:Number;
		
		
		public function Bouncing();
		{
			
			init();
			
			}
			private function init():void
			{
			
			stage.scaleMode = StageScaleMode.NO_SCALE;
			stage.align = StageAlign.TOP_LEFT;
			ball = new Ball();
			ball.x = stage.stageWidth / 2;
			ball.y = stage.stageHeight / 2;
			vx = Math.random() * 10 - 5;
			vy = Math.random() * 10 - 5;
			addChild(ball);
     }
  }
}

and this sub-class


package
{
	import flash.display.Sprite;
	
	
	public class Ball extends Sprite
	{
		public var radius:Number;
		private var color:uint;
		
		
		
		public function Ball(radius:Number = 20, color:uint = 0xFF0000)
		{			
			this.radius = radius;
			this.color = color;
			init();			
			}
			
			
			public function init():void
			{
				graphics.beginFill(color);
				graphics.drawCircle(0, 0, radius);
				graphics.endFill();
				
				
				
				
				}
				
		}	
	}

I get no complier errors , but the swf is empty(background color 0x000000).
Can’ t find the error which drives me crazy! Anyone experienced similar situation? :yoda:(always wanted to use yoda!)