This is also a problem on the octo 2.8.
I tried multiple times to load 32 bit XP into a boot camp partition. On each occasion the when asked for info the keyboard fails to be recognized.
Eventually, I'll call Apple Support and seek an answer (when I have several hours to waste).
You think they might tell you that's a Windows problem and that they don't support Windows?
Do you have another keyboard to try it with? Stupid question, but you are using a wired one right?