webcam problems...

okay, so i have this old webcam and i decided to try and use it
i've had it for a couple years so i dont have the installation cd anymore
all the information i have about it is it has UNICORN written on it
i'm guessing it's using a Sunplus SPCA561 chipset but i can't be sure
my computer detects thew camera but the camera will not work
i downloaded the sunplus drivers but i don't know what to do with them
any help would be greatly appreciated
thanks