Master Volume does not work - Why?

[1010LTGuy]

Hey :),
I got the LATEST driver for my 1010 LT.
Now the MASTER volume does not work.
I can push it up or down but it won't effect the loudness.

I CAN change the loudness in OUTPUT on CHANNEL 1&2, that works.

How can I use the MASTER?
Why does it not work?

The old drivers did well.

Thanks!