Usually don't need my keypad. "Hey, good for using it as a global control for Amarok.", I thought.

But the keypad hotkeys do not work. Two exceptions.

Example:
Menu Options > Global shortcuts >
Start/Stopp: KP_Enter
Back: KP_8
Increase loudness: KP_Add
Decrease loudness: KP_Substract

The first two do not work, when another application has the focus.
The last two work.

Is there any way/workaround to use the keypad as a global control for Amarok?

Thanks.