I noticed that I can't get any other game working either, that requires OpenAL.
The prob seems to be that although OpenAL seems to install properly, it doesn't.
The Babylon Project and Beyond the Red Line both require OpenAL and when i try to run them, i get an error message saying i should update my OpenAL drivers.
So the prob is OpenAL.
Anyone got experience on fixing OpenAL?
EDIT: I've tried googling for this prob, but haven't found a solution.