Bandmates Can't Hear Me

[ArtPlaysBass]

I'm running the condenser mic on my double bass into an acoustic image ten2. I'm then connecting the direct line from my amp and a separate talk-mic through a behringer UMC202HD and the only thing my bandmates could hear was the talk mic. My settings were fine for me--I could hear everything well through the headphone out of the UNC, but there was nothing coming through at all from the line for my bass,

Thoughts?