This is realy weird.
Do you have Javascript enabled? This is a simple javascript
that communicates with Flash and on all systems i have
tested it, it worked out.

I am actually working on XP with IE7 and FF and both work.
So i can only imagine that it might be some kind of "security"
setting within your browsers setup. Where active-x or javascript
is deactivated - could that be?

Big hugs and have a nice day,
Carlos