The drivers are definitely working, in that when I plug it in the volume controls all switch from my laptop's built in sound card to the Line 6 UX2 and the meters on the UX2 light up and show audio coming through it. I have already checked the monkey (everything shows up as green check marks), reinstalled drivers, and checked my audio system to make sure the obvious stuff is set up properly (correct audio out selected, volume turned up, audio cables and USB cables swapped out, speakers are working when plugged into another audio source, etc). My Pod Studio UX2 has suddenly stopped outputting any audio after several months of solid use.