class scope issue?

I am trying to write a class that activates my buttons. I can't seem to make the onRollOver call a function. Why is that? What am I doing wrong?

Thank you for any help with this!



class HomeMain extends MovieClip
{
//Button Variables
private var home_btn0:MovieClip;
private var home_btn1:MovieClip;
private var numOfBtns:Number = 2;
private var whichOne:Number;

public function HomeMain(Void)
{
activateBtns();
}

private function activateBtns():Void
{
for(var i:Number = 0; i < numOfBtns; i++)
{
var ref:MovieClip = this["home_btn" + i];
ref.id = i;
ref.onRollOver = function():Void {
rollOverActions(this.id);
}
}
}

private function rollOverActions(whichOne):Void
{
trace("over");
}
}