Logitech QuickCam Fusion won't show me to others but shows me on my screen.

I bought a Logitech QuickCam Fusion webcam at an Apple store. I can see the person, but they can't see me. There isn't any controls for the camera. I am supposed to be able to zoom and other things, but no controls are there. I logged on to Logitech and they don't make drivers for Macs.
I have an iMac G5 and the salesman said it will work with it, even though the box only listed Windows and not Mac. I went back two times and asked them how to make it work and they couldn't find anyone who knew how to use it. I can't schedule a Genus Bar appointment because they only book two days ahead and they are always full. I figure on taking it back.