Movieclips and Buttons not working together

[COLOR=#000000][FONT=verdana]Hi there,

I have 9 movieclips, and 9 buttons. (mc1, mc2, mc3… & btn1, btn2, btn3…)

I’d like it so that when you rollover the button, the corresponding movieclip begins an animation.

I thought I was on the right tracks here:

for (var i:int = 0; i < 8; i++) {
	this["btn"+i].addEventListener(MouseEvent.MOUSE_OVER, onButtonOver);
	this["btn"+i].addEventListener(MouseEvent.MOUSE_OUT, onButtonOut);
	this["btn"+i].addEventListener(MouseEvent.CLICK, onButtonClicked);

function onButtonOver(e:MouseEvent):void {
	var movieclipVar="mc";// this is what is meant to allow me to target a movieclip, rather than the original button.
	Tweener.addTween(movieclipVar, {x:100, time:0.5, transition:"easeOutBack"});

function onButtonOut(e:MouseEvent):void {
	Tweener.addTween(movieclipVar, {x:0, time:0.5, transition:"easeOutBack"});

function onButtonClicked(e:MouseEvent):void {

I just can’t seem to direct a tween to a corresponding movieclip dynamically. Any help would be greatly appreciated.