Can't keep number lock on wit BIOS or XP settings

I've tried enable the Bios settings for number lock, and this did not work. I've tried XP settings, and that did not come on. I've not tried both, but I don't think that will work either, b/c I hear that XP ignores the BIOS. I am using a Dell USB keyboard. Could it be that a regular PS/2 keyboard would work, but not a USB?

Is there another way to keep number lock on?

 

Doesnt number lock stay on when you press the button?

 

I believe he means "Num-Lock on power up".

 

When I go to standby mode with number-lock on, and come out of it, number-lock is off. The key works fine.