Dynomite Sound

I have the PopCap game "Dynomite" and i know there is an option to set the music and sound. When i go into the options screen, the ability to set the sound volume and music volume down is not there.

What i mean is that there is 2 little "eggs". one on the Music bar and one on the Sound bar. you slide these little eggs across the bar to set the volume. well... the eggs are not there. i tried downloading the demo and the same thing happens.