Can't get audio from 2nd headset mic

I record video and audio from my VR headset, I also record video and audio from my desktop.

This works fine, as the main audio is switched from headset to desktop automatically when the headset is off. And my 1st microphone is the VR mic. 

However I wanted to record audio from my headphone mic. while recording a regular 2d game. and I can not get the mic audio into the premiere pro, first it didn’t want to add the 3rd audio line, but even when I have opened up a 3rd audio channel, there is no recorded audio there, the mic is picked up by OBS. But can’t get PP to show the audio line in the editor.