Ladiesman,,, you got me curious since I dont think I ever tried any of these buttons on my poker.
The mute, vol up and vol down do work... but with a catch. The volume up and down when viewing the volume under windows sounds control panel show it lowering and increasing the sound.
But when in a program like you tube, windows media player, itunes , etc... the volume in those applications dont show it going up or down but since its being controlled by the main windows i do hear the volume is going up and down. not sure if that is correct behavior but that is how it is working for me.
Mute works whenever....I am using windows 7.
Is this the same behavior you are seeing?