I am having problems with the following f-key functions

- Volume
- Brightness
- numlock

f10-f12 keys are working correct.

When I use my external bluetooth mac keyboard, all the f-keys are working correct.

I have tried to enable/disable prefs>keyboard>Use all F1,F2, etc. keys as standard function keys, but makes no difference.

I have tried to reinstall Leopard, but no difference. The keys worked in Tiger.

Any idea to solve this problem? I am thinking driver to the keyboard.