Buttons loading external swfs. Problems when displayed in browser

Hi all. My site is up here: The Aviators

The buttons at teh bottom are supposed to load external swfs and do this when I view the main index movie as a swf in the standalone flash player (as opposed to a swf inside a browser) However when inside a browser none of the buttons work.

Any ideas? I thought perhaps problems with teh paths but it doesn’t change when I make them absolute urls either. Maybe something to do with _root?

Anyway the .fla is here