Default preloader doesn't work / Best way to load large graphics

The site in question is http://beta.motionnotion.com

The big Flash header is like 800kb, but for some reason, the default Flash preloader isn't working.

Two questions:

1. What's the best way to preload big bitmap graphics (Such as the scrolling bg; the android head)
2. How should I preload开发者_如何学Python this movie, and why doesn't the default Adobe Flash preloader fire?

Thanks, and apologies if this question is too vague -- please comment and I can expand.

1. Use a preloader, compress images as much and reuse as often as possible.
2. There is no such thing as a "default Flash preloader". You have to program your own.

There is no preloader code in your header file. Nothing will happen, unless you add some. Have a look at this tutorial to see how it could be done.