Probleme changing the value of a variable in movieclip from my scene

Question

Hello,
i have a probleme changing the value of a variable in movieclip from my scene. i explain: I have combobox on my scene containing categories, and in the scene i load an xml file containing links to php files that work with the combobox.
Also on the scene i have a movieclip "filmstrip", inside this movieclip on the first frame i have a script loading the php file selected in the scene . i use a load() function with a variable "theUrl" inside like this : T.load(theUrl);.
In my scene i want to change the value of "theUrl" inside the movieClip filmstrip. I tried filmstrip.theUrl = url; But it doesnt work
the xml file
<?xml version="1.0" encoding="ISO-8859-1"?>
<slideshow>
<area title1="10 Last updated" link1="link1.php"/>
<area title1="special" link1="link2.php"/>
</slideshow>
here is the code on my scene:
var link1:Array = new Array();
var LINK:String;
var url:String;
var whoOn:Number;
whoOn=0;
var x:XML = new XML();
x.ignoreWhite = true;
x.onLoad = function(success) {
var photos:Array = this.firstChild.childNodes;
for (i=0; i<photos.length; i++) {
_root.link1.push(photos[i].attributes.link1);
url=link1[whoOn];
filmstrip.theUrl=url;//<<--HERE
x.load("category.xml");
var cbListener:Object = new Object();
cbListener.change = function(event_obj:Object) {
trace(select.selectedItem.label);
if (select.selectedItem.label == "Last updated") {
whoOn=0;
} else if (select.selectedItem.label == "Special") {
whoOn=1;
url=link1[whoOn];
filmstrip.theUrl=url; //<<-----HERE  
select.addEventListener("change",cbListener);
here is the code inside the movie clip "filmstrip"
var T:XML = new XML();
T.ignoreWhite = true;
T.onLoad = function(xml) {
etc etc etc }
T.load(theUrl);    //<<---HERE it still undefined

Answer 1

YESSSS . Thanks you very much Kglad it wotk i put all in a function inside the filmstrip function Tload(theUrl){etc ect}and in the root i call it like this filmstrip.Tload(theUrl);   and it works
code in the root var link1:Array = new Array();
var LINK:String;
var url:String;
var whoOn:Number;
whoOn=0;
var x:XML = new XML();
x.ignoreWhite = true;
x.onLoad = function(success) {
var photos:Array = this.firstChild.childNodes;
for (i=0; i<photos.length; i++) {
_root.link1.push(photos[i].attributes.link1);
url=link1[whoOn];
theUrl=url;
filmstrip.Tload(theUrl);//<<--HERE
x.load("category.xml");
var cbListener:Object = new Object();
cbListener.change = function(event_obj:Object) {
trace(select.selectedItem.label);
if (select.selectedItem.label == "Last updated") {
whoOn=0;
} else if (select.selectedItem.label == "Special") {
whoOn=1;
url=link1[whoOn];
theUrl=url;
filmstrip.Tload(theUrl);//<<-----HERE
select.addEventListener("change",cbListener);