Flash in Mozilla FF vs IE7 and Flock

I would be really grateful if someone could cast some light on this issue, as I
am about to enter my Flash story for my MA dissertation.

The issue is this, I can see both the Flash film and my list of chapter (made
in a swf file) when viewing in IE7 and Flock (and it is fine in Safari and
Opera too), but for some odd reason I cannot see the chapter list when I view
this project in Mozilla Firefox. Also, once I get to the end of the swf movie,
the forward button disappears after a time, leaving the viewer stranded. I am
not sure if I might have some problem with the way I have Mozilla set up on my
desktop and laptop, or whether this is a Mozilla Firefox issue. Is there
anything I can do to correct this problem?
My college tends to favour Firefox, so I fear that I may really flop with this
project if I do not fathom the problem out soon.

Just to make it clearer what I am talking about, here is the link to one of
the storys chapters, and you may want to view in IE7 first so that you can see
what I am talking about, before viewing in Mozilla.
http://www.primalwounds.com/primal3/index-3.html
Thanks,
Marychan