Line Input on UR44

Just got myself a UR44. Seems to work fine so far with Ableton according to some tests I have done. The only issue I encountered, if I want to send a signal through the line input, while I can see the signal coming in through the UR44 mixer on the screen, and also hear the signals through the headphones. However no program I have including Ableton sees the signal. Even on Windows 10 recording devices sees no signal.
All ok going through MIC/LINE but nothing through Line input, though I can hear through headphones.
Anyone face the same issue?

Sorry, but this is the german forum. You’ll probably get a faster reply if you post this in the english forum.