Preloader - finishes before movie is loaded

Hey guys,

New to the forums, but was hoping I could get a quick hand.
I have a preloader on frame 1 of my fla, and everything else comes in frame 2.

When I use the simulate download setting when testing, once loading hits about 50%, the preloader disappears and the movie continues to frame 2. This causes a problem because flash then pauses and waits for the rest of the content.

Could this be because I have movies nested in other movies?
It usually pauses right at the point I have the menu mc tweening onto the stage. Is there a way to force the enitre movie to load at the beginning?

Thanks.