Won't work in Firefox (v9.0.1)

The forward/backward gestures work flawlessly in Internet Explorer and Windows Explorer, yet for some reason whenever I do these gestujres in FF9 the "Learning Mode" window constantly pops up (even though I've disabled the "prompt to learn unrecognized commands" option!).

What could be the problem behind this and, more importantly, the solution?

Nevernind, I've solved it :)
It was my mistake, I accidentally messed up the hotkey commands...