Progressive download on swfs

Hey everyone. here’s my problem. I have a swf with just a jpg as the background and a simple animation. I simply want the swf to start playing and do a progressive download and continue to play. With the jpg it won’t start playing until the jpg is finish downloading. Without it will start playing and downloading at the same time. I am using Event.INIT to know when the swf is loaded enough to play. Any idea why it won’t ‘stream’ with the image?