Asus M2N keyboard problem

Question

My Asus M2N will not recognize any PS/2 keyboard that I use, saying there is something wrong with the drivers. I bought a ps2/usb adapter and it recognizes my ps2 optical mouse but wouldn't recognize any of the three keyboards I tried. I need to do something in BIOS and I can't without a keyboard. Also, where can I find drivers for a Pioneer DVR A09XLCI and a Lite On LH-52CIP DVD drives?