Card Reader not working, really need help!

Question

I have digitial concepts card reader and put in it a compact flash card (256mb) cuz it wasnt directly connecting from my camera, and it is not working. it is saying it does not have the correct drivers installed and its an unknown device. i am using a sony laptop with windows xp. ive been trying for hours but nothing happens when i connect it, i tried downloading everything and nothing is working, is there any hope for this???