Problem with Drivers

I've recently been trying to put Windows 7 Ultimate on my 13-Inch Macbook Pro recently. The first steps of the process have gone smoothly, but I seem to be having a problem with installing the drivers. I am sure I followed the instructions as they said, yet whenever I finish the installation of the drivers and restart the computer, they don't work. I've tried repairing the drivers countless times but to no avail. Can someone diagnose my problem and tell me a way to fix it? Help would be greatly appreciated.