News Ticker in Flash and XML

I created a News Ticker in Flash CS3 from a tutorial on your site http://www.kirupa.com/developer/mx2004/newsticker.htm

But it just flashes “undefined” I know I must be messing something up with the location of the XML file or where it’s defined in the action script. I don’t think I understand the “cache” part of the tutorial or why the file can’t be local? I have gone to the suggested links in the tutorial, and being a total novice, I must be missing some main point. I’m attaching the xml and fla. files, if you could please help.
thank you
Nishka