I'm probably being stupid, but everything works perfectly for recording on a track until I unplug my interface (M-Audio). Once I plug it back in, previously created songs won't recognise the interface, or just seem to think it's not sending anything. I can simultaneously create a new track and record on that, and that'll be fine until I unplug the interface again. Once it's plugged back in, that track will then cease to be able to record.
I'm guessing there's a setting somewhere to reinitialise USB or something. Can you help?