Check the tutorial again. You downloaded the file at the end, when I last updated the tutorial I updated the code in the tutorial, but forget to supply a new .fla for Kirupa to throw up there, so the downloadable file contains the old code, but the tutorial itself contains the new code that should work.
How long has this place been around? I really have no clue, before it was a vBulletin board it used to be hosted on ezboard.com. I wasn’t here then. I signed up July 22, 2002, the day after I started learning AS Ahhh, those were some good times.