Help with Snow 2.0

I saw the Snow 2.0 tutorial here:
http://www.kirupa.com/developer/mx2004/snow.htm

I wanted to do it, so I followed the instructions, but when I finished, a box came up that said,

A script in this movie is causing Flash Player to become unresponsive. Do you want to abort the script?

I know it’s not my version of flash because I downloaded the Flash MX file and that worked fine. Can someone help?

I’m using Flash MX Pro 2004.