Sound toggle buttons sound disappeared?

[rekhyt]

You know when you press F4 or F5 the sound goes up and down, and then a small beeping noise goes along with it? It somehow disappeared in OS X and now when I toggle the media control buttons (F4/F5 (Old keyboard layout) it changes the sound, but has no beeping noise to go along with it.

Noise is still ok in Windows (XP). Help?

 

[Jisuo]

Have you checked in System Preferences > Sound and checked "Play feedback when volume is changed"? Or uncheck and check again.