Regarding centered pop up tutorial

Hi there:

Apologies in advance for my novice questions.

After using the centered pop up tutorial, I am having a few problems. I am trying to have the centered pop up window contain a quicktime movie. After pasting the code in, and previewing in the ‘default’ option, I get a centered pop up window that doesn’t display my movie. If I publish the movie, the pop up is a full size browser window, that also doesn’t play my movie.

Any ideas as to where I am going wrong? Should I be using a swf instead of a quicktime?

Thank you!