Media Buttons On Inspiron 6400 Won't Work

Hello there.

Recently I've changed from my isntallation suse language to english. So noy my suse is all in english. But I've left configuration for my conuty layout.

Anyway media buttons aren't recognized anymore. When I start xev and pressing xev I get nothing:

KeyRelease event, serial 31, synthetic NO, window 0x3e00001,
root 0x89, subw 0x0, time 864491479, (83,81), root756,658),
state 0x2000, keycode 174 (keysym 0x0, NoSymbol), same_screen YES,
XLookupString gives 0 bytes:
XFilterEvent returns: False


And that's for any media button.

What could cause the problem, what should I do or start learning ?

Thanx in advance!