Volume control not responding on MS Wireless KB

[Mav451]

Hey guys, I got a MS Wireless Natural KB.

Every button, from the My Doc/Pic/etc. works, hell, even the play/stop buttons work. But for some damn reason, my + and - buttons for volume don't do jack.

My old wired Natural KB's volume controls worked just fine. Anyone else have this problem?

 

[Mav451]

Un_freaking_believable. I disconnect it from USB, and connect it instead to PS/2.

Voila, volume control works. Pretty messed up.