usb wireless keyboard not working at boot menu

[Evren Yurtesen]

Hi,

I have a usb wireless keyboard/mouse combo which doesnt work at beastie. 
It works before and after the boot menu perfectly fine. But not in 
beastie so I am not able to enter to single user/safe mode etc. unless
I plug in a ps2 keyboard.

Do you know a workaround for this?

Thanks,
Evren