Microsoft Comfort Keyboard 1.0 special keys stopped working.

Hi,

I have an old microsoft comfort keyboard 1.0a that I love. I use a lot of the special keys added to access to different files and apps.

But all thoses keys stopped working except for the volume up/down/mute.

I bought another keyboard (same model) cause I thought the peripheral was bad.

It do the same...

I downloaded and installed the driver from microsoft for mac. Nothing, even when un-installing it...

I now have a new macbbok retina so I'm on 10.8, but It was doing the same on 10.7... The driver is for 10.4 to 10.7... But I don't understand why It wasn't working with 10.7.

Thoses keys help really my productivity...

Any ideas?

Thanks

Simon