Barra de Rolagem

Pessoal, estou com problemas nesta barra de rolagem:

quando clico nela para rolar, mantenho clicado, e saio da área do scroll, ele continua rolando se mexo o mouse, e só para quando volto para cima do scroll,

vou colar o script, me ajudem porfavor!!!

Valeu !

http://www.yieldmkt.com/tc2-aboutus.php :: Clique aqui

function scrollMyContent () {
	// Cache the TextField as a bitmap to improve performance.
 content_mc.cacheAsBitmap = true;
	// Event Listeners
	scrollDragger.addEventListener(MouseEvent.MOUSE_DOWN, scrollDraggerPress);
	stage.addEventListener(MouseEvent.MOUSE_UP, mouseUpOnStage);
	// Set variables
	var scrollbarHeight:Number = scrollbarBG.height;
	var contentHeight:Number = content_mc.height;
	var scrollDraggerHeight:Number = scrollDragger.height;
	var maskHeight:Number = contentMask.height;
	var scrollAmout:Number = (contentHeight-maskHeight)/(scrollbarHeight-scrollDraggerHeight);
	var topBound:Number = scrollbarBG.y;
	var bottomBound:Number = scrollbarBG.height-scrollDraggerHeight+scrollbarBG.y;
	var startPos:Number = content_mc.y;
	var leftBound:Number = scrollbarBG.x;
	var absNumSet:Number = 0;

 // When scrollDragger gets pressed we do this
	function scrollDraggerPress(event:MouseEvent):void {
 // Set bounds using some of the scroller BG properties claimed above
 var bounds:Rectangle = new Rectangle(leftBound, topBound, 0, bottomBound);
 scrollDragger.startDrag(false, bounds);
 stage.addEventListener(MouseEvent.MOUSE_MOVE, reportStageMouse);
 function reportStageMouse(event:MouseEvent):void {
 absNumSet = Math.abs(scrollbarBG.y - scrollDragger.y);
 content_mc.y = Math.round(absNumSet * - 1 * scrollAmout + startPos);
 }
	}
	// When mouse is released while dragging we do this
	function mouseUpOnStage(event:MouseEvent):void {
 stopDrag();
	}
}
scrollMyContent();