Problems flashing Gigabyte GA-8KNXP Rev 1 BIOS

[chicsdiggit]

I have a P4 3.2C, with the Gigabyte GA-8KNXP Rev 1 board and I am having trouble when I flash the new BIOS file. After I flash the new file, it says "cannot find NTLDR". "Press ctrl+alt+del to restart". I just flashed an identical computer with this same bios, and it went smoothly. What gives? Also, I updated my sound drivers, and I downloaded the latest ATI drivers, and the windows control panel will not allow me to uninstall the old ATI driver. It says something like "failed to initialize uninstall". How do I get the new driver installed? Thanks for your guys' help!