Scroll lock on USB keyboard does not enable scroll lock

I have a Windows keyboard that attaches to a KVM that I use to control my Macbook Pro and my desktop. Pressing scroll lock twice on the KVM switches between the two computers. On the Macbook scroll lock is mapped to the decrease brightness button, and pause/break is mapped to increase brightness. I can switch between the two machines, but the screen changing brightness is a bit of an annoyance.

Is there a way to map the scroll lock button to using scroll lock on just the USB keyboard?