Can't Scroll Through GNU GRUB?

[AppleGeek911]

I just installed Elementary OS Luna alongside Windows 7 on my custom rig via a CD. When my PC boots from the HDD, it enters GNU GRUB version 1.99-21ubuntu3.10 and asks what OS I’d like to enter. I can’t scroll through the grub with the arrow keys. I can't even hit enter to boot from the top entry. I've tried multiple keyboards with no luck. Any suggestions?

 

[ryanvade]

Is there a setting in the BIOS about USB keyboards?

 

[arochester]

I've tried multiple keyboards with no luck.

PS/2?

 

[AppleGeek911]

Is there a setting in the BIOS about USB keyboards?

Thanks for the help! USB keyboard was disabled in my BIOS.