Help with a multidimensional array

I’ve been trying to figure this out for a couple days now, and could use some help. I’m trying to build an 8x8 grid of identical movieclips, in a multidimensional array, that I can then access by row, and play each in order. So far, I can get them into the array, but I’m having trouble playing each item in a row. Basically, I have 8 more selector buttons in another array, and I added an event handler to each of those, and I want to use the index position of each selector button to play the corresponding row in the first array. Any tips? I’d really appreciate some help with my first Actionscript project. Thanks!

//The first Array
for ( i = 0; i< 8 ; i++)
{//create a row
    beatsArray* = new Array();
    for (var j:Number = 0; j<8; j++)
    {//add 8 instances to the row
        beats = new Beats;
        addChild(beats); = "beats"+j;
    //set x and y of instances
        beats.x = beatsX;
        beats.y = beatsY;
        beatsX += 75;
        if (beatsX >790)
            beatsX = 220;
            beatsY +=50;
}//end array

//the event handler I'm tryin to use. Obviously this doesn't work right now

function playRelated(event:MouseEvent):void


    var selectorArrayPos:Number = selectArray.indexOf(;
    var timerVar:Timer = new Timer(500,8);
    timerVar.addEventListener(TimerEvent.TIMER, playInOrder);
    i = 0;
    function playInOrder(event:TimerEvent)
        beatsArray["row"+selectorArrayPos]*.play();//play each clip in a row