I have a Nikon S4000 camera that is unable to connect to my PC. I have tried it on other computers and my laptop and it works fine. Just not on my main computer. Please help. I have Windows XP Professional on this PC. It just makes a computer noise and the camera's battery charge light comes on, but nothing else happens and if I go to "My Computer" to see if it picked up... there is nothing except C: the other drives that shows are empty.