UR44 no mic input level at all

I just upgraded by CI2 to a UR44. As far as I can tell, I installed everything correctly as per the instructions.
I’m using the UR44 with Cubase 8.5. I open up an existing project, Cubase prompts me to re-map my inputs from the CI2 to the UR44, which I do.
Playback is fine, but I have absolutely NO mic input levels. I’ve tried with both a SM57 and a SM7B.
I’ve updated both the firmware and the driver to the latest versions.
What am I doing wrong?