"Script is causing Flash Player 9 to run slowly"

Hello,

Ever since I changed over to a MAC OS X running Flash CS3, I’ve been running into problems. One of the problems that I’m facing is when I publish my fla file within Flash and view the HTML, it views ok. But when I upload my swf and html to my server my swf doesn’t play and I receive a browser message:

A script in this movie is causing Adobe Flash Player 9 to run slowly. If it continues to run, your computer may become unresponsive. Do you want to abort the script?

My publish settings for my fla is:
Version: Flash Player 8 (even if I change this version to Flash Player 9 I still get the browser message.
Load order: Bottom up
ActionScript version: Actionscript 2.0

And I’ve also tried embedding the swf in Dreamweaver CS3 but I still receive the browser message. In the first frame of my fla file, I do have #include “script.as” and there are no errors in this script.as file. I initially created this fla on a PC using Flash 8 and now on Flash CS3 my thumbnail images don’t show.

Can anyone tell me what I’m doing wrong?

Thanks so much!