Keyboard layout change in sub-SWFs?

I have a flash movie where everything works fine.

But in the SWFs I load on top, the key combination to make the “@” symbol gets changed! So then it doesn’t correspond to my keyboard layout anymore. It has become a serious problem for the site’s users. :crying:

(from ALTGR-2 it changes to SHIFT-2)

Any ideas of things that could cause this?