Audio recording problems tonight

From the Behringer mixer there is a lot of hiss. If I have any of these above the middle I get it: Gain, level 1, and main mix. I have all the other inputs down.
These results occur whether or not the mic is on or even plugged in. It also does not matter whether I listen through headphone jack or main out.

I wasn't able to use Audacity's monitor function but then suddenly it started working. It may be that you have to start a new project or track.

It wasn't until I started recording that I had these systemuiserver problems.