I just purchased a Logitech QuickCam Ultra Vision to use with my Leopard based mac pro since I read that they work well with OS X but I can't get it to work. I have plugged it into a USB hub and even the USB port on the front of the computer. I have also restarted the computer. It doesn't recognize it at all. From what I read there is no need to install a driver. I have even pressed the buttons on both side of the computer. I am trying to use it with PhotoBooth. Is there something I'm doing wrong or could it be a faulty camera?