Help with class error

Button class:

package
{

    import flash.display.Sprite;
    import flash.text.*;
    import gs.*;
    import flash.events.MouseEvent;
    
    public class Button extends Sprite
    {
    
        public var _label:String;
        private var box:Sprite;
        private var boxOver:Sprite;
        private var menu:TextField;

        
        function Button(label:String)
        {
        
            _label = label;
        
            createbox();
            createboxOver();
            createmenu();
        
            

        
            addChild(box);
            addChild(boxOver);
            addChild(menu);

        
        }
        
        private function createbox(){
        
            box = new Sprite();
            box.graphics.beginFill(0xcccccc);
            box.graphics.drawRect(0,0,160,24);
            box.graphics.endFill();
        
        }
        
        private function createboxOver(){
        
            boxOver = new Sprite();
            boxOver.graphics.beginFill(0x990000);
            boxOver.graphics.drawRect(0,0, 160, 24);
            boxOver.graphics.endFill();
            boxOver.scaleX=0;
        
        }
        

        private function createmenu(){
        
            menu = new TextField();
            menu.text = _label;
            menu.x=boxOver.x+2;
            menu.y=boxOver.y+2;
            
        }

        
        public function events(e:MouseEvent){
        
            box.addEventListener(MouseEvent.ROLL_OVER, overHandler);
            box.addEventListener(MouseEvent.ROLL_OUT, outHandler);
            
        }
        
        public function overHandler(e:MouseEvent):void{
        
            TweenLite.to(boxOver, .5, {scaleX:1});
            
        }
        
        public function outHandler(e:MouseEvent):void{
        
            TweenLite.to(boxOver, .5, {scaleX:0});
            
        }
    
    }

}

Document frame 1 as:

var butn:Button = new Button("hello");
addChild(butn);
butn.x=100;
butn.y=100;


The Roll Over and Roll Out State isn’t working.

Please help thanks!