MixPre-6 recording levels are too low
I bought a Sound Devices MixPre-6. I hooked it up to my Windows 10 computer using the provided USB-Y cable in order to use Audition to record multiple channels.
It was recording L/R just fine, but I wanted to get it to record individual channels into separate tracks. I downloaded and installed the ASIO (2.9.92.6) and installed into windows. I updated the firmware of the mixpre to 6.00.
When I reopened audition I switched the audio hardware to ASIO. This allowed me to set the input for each track. But now when I record, the waveform appears silent.

But if I go into the clip gain and bump it up by 37db then I can see that there was a waveform recorded.

However on the mixpre the levels appear normal.

I've tried to adjust every setting in the Audio Hardware menu. But there's no change. When I record it on the mixpre at the same time as audition, the mixpre's playback sounds fine.
What is going on? Please help.
