Mouse scroll on PC

Hi- new to the forum/flash and having problems with a custom scroll bar.

Website: www.whitedesignstudio.com/Kaplan
Click on Why Choose Us (it takes a second to load)

I would like the mouse on a PC to scroll the text the same way as the scrollball does when you click it and drag up and down on the scrollbar. Right now the text and scrollball move in the right direction when you mouse scroll but they do not stop and they do not move at the right speed to each other.

Any ideas? It’s driving me nuts so any help is appreciated.

The text is not dynamic and just has a mask over it. Instance name is auconent for text and scrollball for the scrollball.

var scrollUpper:Number = 148.5;
var scrollLower:Number = 352.4;

var textLower:Number = 148;
var textUpper:Number = -129;

var scrollRange:Number = scrollLower-scrollUpper;
var textRange:Number = textLower-textUpper;

function scroll() {
	var moved:Number = scrollball._y-scrollUpper;
	var pctMoved:Number = moved/scrollRange;
	var textMove:Number = pctMoved*textRange;
	aucontent._y = textLower-textMove;
}

scrollball.onPress = function() {
	this.startDrag(false, this._x, scrollUpper, this._x, scrollLower);
	this.onMouseMove = scroll;
};
scrollball.onRelease = scrollball.onReleaseOutside=function () { 
this.stopDrag();
this.onMouseMove = null; 

var mouseListener:Object = new Object();
mouseListener.onMouseWheel = function(delta) {
    aucontent._y += delta;
    scrollball._y -= delta;
}
Mouse.addListener(mouseListener);
}

Thank you!!