Ableton - LPK25 help

Ableton - LPK25 help

So I just got a LPK25 and yesterday it was working fine in Ableton, today however I can’t get anything to play with it. I’ve armed the tracks, checked the in/out. I really have no other ideas of how to get it to work.

You didn’t mention arming a MIDI track with an instrument/VSTi on it. :U