I've created and published a Flash file for Flash 6 player. I opened it up on my local machine and everything works perfectly.

I put it on the test server, and when I open it there, it doesn't play at all. It just opens and displays black. I put it on the live server, and it plays perfectly there, if I'm on a PC, but not on a Mac.

What's the deal? Why is my Flash game being so picky?