Actionscript 3 mouse over problem when I move the mouse in and out very fast

// MenuItems.as
 
package {
	
	import flash.display.Sprite;
	import flash.display.MovieClip;
	import flash.events.*;
	import fl.transitions.Tween;
	import fl.transitions.easing.*;
	import flash.text.TextField;
	import flash.text.TextFormat;
	import flash.text.TextFieldAutoSize;
	import flash.utils.Timer;
	import flash.media.Sound;
	import flash.net.URLRequest;
	
	public class MainMenuItem extends MovieClip {
		
		private var movMenuBox 		: MovieClip;
		private var txtfMenuFont 	: TextFormat;
		private var txtMenuText		: TextField;
		private var clrMenuColo		: uint;
		private var isGone			: Boolean;
		private var	twMenuTween		: Tween;
		private var sndMenuOverSound: Sound;
		
		public function MainMenuItem(menuLabel : String, menuColor : uint) : void {
			clrMenuColo = menuColor;
			constructItem(menuLabel);
			sndMenuOverSound = new Sound(new URLRequest("sounds/menubip.mp3"));
			
														
			
		}
		
		private function constructItem(menuLabel : String) : void {
			txtfMenuFont = new TextFormat();
			txtfMenuFont.font = new menuFont().fontName;
			txtfMenuFont.size = 8;
			txtfMenuFont.color = 0xffffff;
			
			txtMenuText = new TextField();
			txtMenuText.defaultTextFormat = txtfMenuFont;
			txtMenuText.embedFonts = true;
			txtMenuText.text = menuLabel;
			txtMenuText.autoSize = TextFieldAutoSize.LEFT;
			txtMenuText.selectable = false;
			txtMenuText.mouseEnabled = false;
			
			movMenuBox = new MovieClip();
			movMenuBox.graphics.beginFill(clrMenuColo);
			movMenuBox.graphics.drawRect(0,2, 200, 10);
			movMenuBox.graphics.endFill();
			movMenuBox.width = 200;
			movMenuBox.height = 20;
			
			addChild(movMenuBox);
			movMenuBox.addChild(txtMenuText);
			
			txtMenuText.addEventListener(MouseEvent.MOUSE_OVER, overMenuEvent);
			txtMenuText.addEventListener(MouseEvent.MOUSE_OUT, outMenuEvent);
			movMenuBox.addEventListener(MouseEvent.MOUSE_OVER, overMenuEvent);
			movMenuBox.addEventListener(MouseEvent.MOUSE_OUT, outMenuEvent);
			
		}
		
		private function overMenuEvent(e : MouseEvent):void{
			twMenuTween = new Tween(this,"alpha",Regular.easeIn,1,0.6,10);
			sndMenuOverSound.play();
		}
		
		private function outMenuEvent(e:MouseEvent):void{
			
			twMenuTween.yoyo();
			
		}
		
		
	}
}