ActionScript 3.0 :: Properties Between SWFs In Different Browsers?

My main swf calls in an audio player that I wrote as a separate swf. There's a seek function inside the audio player that skips to any given track in audio player's list, after receiving 2 arguments: artist name and song name. That's semi-irrelevant... but just to keep you updated.

In the parent swf, there's a list of songs, and when clicked, each song will pass those 2 arguments to the audio player swf's seek function. The problem is simple enough to explain:

In the Flash test, it works fine. In IE it works fine. In firefox, I click the song button, and nothing happens. The audio player still works fine, but I can't seek to other songs from the parent swf.