attachMovie + onRelease - the problem

programming flash
1

Here my problem:
i created a site in flash and xml that has one photo gallery with link in photos.
when click in photos may load the large photo. Right. but now when i click in some photo load the same large image, load the ultimate large image from xml file.

_global.path = "";
var plevel:Number = 1000;
for (i=0; i<20; i++) {
    var peca:MovieClip = attachMovie("gal","gal"+i,plevel++);
    var fotog:String = xdata.childNodes[0].childNodes*.childNodes[0].firstChild;
    var fotol:String = xdata.childNodes[0].childNodes*.childNodes[1].firstChild;
    peca.loadMovie(_global.path + fotog);
    peca._x = 120*i;
    peca._y = 130*i;
    peca.onRelease = function() {
        largph.loadMovie(_global.path + fotol); // here load only ultimate node  of xml
    }
}

Anyone know how to do it ? load independent large images …
Tks Guys!