onPress and looping xml problem

Ok, I’m having a problem with my onPress actions when reading them form an XML file. Here’s what I’m trying to do:

Read xml file
duplicate movie clip according to how many xml items there are.
place a different onPress action to each movie clip according to what the corresponding path is in the xml.

my problem is that each time i press any movieclip I always get the last path in the xml file. The loop is over writing the value and when the onPress function is called it uses the last value. How do i get the onPress to remember which movie clip it is and use the appropriate onPress action?

here is my code:

import mx.transitions.Tween;
import mx.transitions.easing.*;

var Portfolio:XML = new XML();
Portfolio.ignoreWhite = true;
Portfolio.onLoad = function(bSuccess:Boolean):Void {
var xnPortfolio:XMLNode = this.firstChild.firstChild;
var xnItems:XMLNode = xnPortfolio.firstChild;
var xnTotalItems = xnItems.childNodes.length;
var VidUrl:Array = [];

    for(var i:Number = 0; i < xnTotalItems; i++) {
        c = i + 1;
        xnItem = xnItems.childNodes*;
        var xnItemThumb:XMLNode = xnItem.attributes.thumb;
        var xnVidUrl:XMLNode = xnItem.attributes.movie;
        VidUrl[c] = xnVidUrl;
        duplicateMovieClip(thumbnails.thumbnail, "thumbnail"+c, i);
        setProperty(thumbnails["thumbnail"+c], _x, 98*i+43);
        thumbnails["thumbnail"+c].onRollOver = function () {
            new Tween(this, "_xscale", Strong.easeOut, 100, 140, 20, false);
            new Tween(this, "_yscale", Strong.easeOut, 100, 140, 20, false);
        thumbnails["thumbnail"+c].onRollOut = function () {
            thumbX = this._xscale;
            thumby = this._yscale;
            new Tween(this, "_xscale", Strong.easeOut, thumbX, 100, 20, false);
            new Tween(this, "_yscale", Strong.easeOut, thumbX, 100, 20, false);

        thumbnails["thumbnail"+c].onPress = function():Void {

Portfolio[“target”] = this;