Loaded stylsheet for loaded xml not recognised

Question

The following code loads correctly the xml file but not the stylesheet.
Do I have to change the ordrer of some chunks of this code?
(ta = textarea movieclip;
in the css I only have, for the test, spectacle>item>title {font-size:40;}
Thank you for your help.
var loaderXML:URLLoader = new URLLoader();
var loaderStylesheet:URLLoader = new URLLoader();
loaderXML.addEventListener(Event.COMPLETE, onLoaded);
loaderXML.load(new URLRequest("list.xml"));
var xml:XML;
var sheet:StyleSheet = new StyleSheet();
ta.styleSheet = sheet;
var req:URLRequest = new URLRequest("test.css");
loaderStylesheet.load(req);
loaderStylesheet.addEventListener(Event.COMPLETE, loaderCompleteHandler);
function loaderCompleteHandler(event:Event):void {
      sheet.parseCSS(loaderStylesheet.data);
function onLoaded(e:Event):void
        xml = new XML (e.target.data);
        //trace(xml.channel);
        var il:XMLList = xml.spectacle.item;
        for(var i:uint = 0; i<il.length(); i++)
        var titre:String = il.title.text()[i];
        var jour:String = il.jour.text()[i];
        var heure:String = il.heure.text()[i];
        var lieu:String = il.lieu.text()[i];
        var adresse:String = il.adresse.text()[i];
        var code:String = il.codepostal.text()[i];
        var ville:String = il.ville.text()[i];
        var newstring:String = titre.concat("\n", jour, " ", heure, "\n", lieu, "\n", adresse,"\n", code, " " ,ville, "\n\n");
        ta.text += newstring;

Answer 1

loading is asynchronous:  it isn't a matter of when you START loading your objects, it is a matter of when your objects COMPLETE loading.
use:
var loaderXML:URLLoader = new URLLoader();
var loaderStylesheet:URLLoader = new URLLoader();
var xml:XML;
var sheet:StyleSheet = new StyleSheet();
ta.styleSheet = sheet;
var req:URLRequest = new URLRequest("test.css");
loaderStylesheet.load(req);
loaderStylesheet.addEventListener(Event.COMPLETE, loaderCompleteHandler);
function loaderCompleteHandler(event:Event):void {
      sheet.parseCSS(loaderStylesheet.data);
loaderXML.load(new URLRequest("list.xml"));
loaderXML.addEventListener(Event.COMPLETE, onLoaded);
function onLoaded(e:Event):void
        xml = new XML (e.target.data);
        //trace(xml.channel);
        var il:XMLList = xml.spectacle.item;
        for(var i:uint = 0; i<il.length(); i++)
        var titre:String = il.title.text()[i];
        var jour:String = il.jour.text()[i];
        var heure:String = il.heure.text()[i];
        var lieu:String = il.lieu.text()[i];
        var adresse:String = il.adresse.text()[i];
        var code:String = il.codepostal.text()[i];
        var ville:String = il.ville.text()[i];
        var newstring:String = titre.concat("\n", jour, " ", heure, "\n", lieu, "\n", adresse,"\n", code, " " ,ville, "\n\n");
        ta.text += newstring;