Multimedia keys not working while being in Studio One

I have a Logitech keyboard on my Windows 7 PC which has Multimedia keys.

With these keys you can tu up or down the volume, stop, play, switch track.

They always work, but as soon as I am in Studio One, they stop working.

For stop and play it's no problem, but I really wish I could change the volume with these keys.

It seems Studio One blocks them somehow.

Any way to fix this?