They want a loading bar on it. I added one within the same scene as everything else and it worked just fine when I tested it within Flash. Upon uploading it, however, the loading bar didn't show up, plus it caused an odd full-screen white flash upon clicking one of the buttons (clicking the spikey-hair guy's underwear causes a sound to play - this is the only button that had the flashing issue).
Next, I tried building the loading bar in a separate scene. Again, it works perfectly when I test it within Flash, but I get the same results as previously when I upload it to the server: no-show loading bar and weird flashing when the underwear is clicked to play the sound.