I recently changed my system configuration for a brief time because I had bought a new external converter for my setup, but I have returned it and put everything back to how it was before.  When I did, I noticed that the Mute button in TotalMix no longer works.  I click on it but the channel doesn't mute.  The fader volume works fine and everything else seems to be working, but the mute does not mute.  Any ideas what this could be and how to solve it?

In case it helps, I am operating in a windows 10 based system, and my interface that goes with TM is a Fireface 802.

thanks!

https://www.dropbox.com/s/maodifqbduh71 … r.JPG?dl=0