XML.onLoad(success) doesn't work like it used to?

[>flashl!ght<]

taken from a Flash MX project, works in SA player 6, MX IDE, IE player 7, but not in a browser with player 8:

code:

---

//SITE DATA LOAD

_global.siteXML = new XML();

XML.prototype.ignoreWhite = true;

siteXML.load("site.xml");

siteXML.onLoad = function(success){

	if(success){

		//snipped

	}else{ //if XML failed to load, show a error message textfield

		_root.createTextField("txt",1,0,0,100,20);

		txt.text = "XML load failed.";

	}

}

---

The textfield never shows up in F8...

What's going on? It's just a simple onLoad(success) method...

I'm on a Pentium III / XP, tried Mozilla, and IE doesn't have F8 installed(and it works on IE, player 7)