Delay before preloader loads?

I have a 5 MB project with a simple frame based preloader. I’ve imported the swf and simulated various download speeds. The preloader is working fine, but before the preloader comes on the screen there are ten-or-so seconds of just the black background (and that’s on a T1 setting). The preloader is very, very simple at present with only text and a simple button that kicks in once the main movie has loaded. Anyone know?