I've been recording drum covers for a couple years now without any problems. At the time (2 months ago) I've been using a Peavey PV14 USB mixer. When I would record in garageband, I would have 1 drum track then an audio track (the song), I could hear the song playback through the mixer to the headphone jack. Well after selling the Peavey to upgrade to the VSL1818, I cannot receive signal to the audio track. Why is this? It makes me mad because I've been wanting this interface for a long time (for the separate drum track channels) and now this happens. What do I have to do? Thanks!