FlashCS3/AS2 - Need Help With Popup Windows

I followed the tutorial on the centered popup window: http://www.kirupa.com/developer/mx/centered_popup.htm. But I have questions about it because it’s not working. Does the whole popup window thing work if I’m loading the movie that has the popup function into another movie? For example, Movie#1 is loading Movie#2 within it, and Movie#2 is the movie that has the popups. Also, does the on(release) codes have to be applied to a button? Can it be on a movieclip?

Thank you in advance.