Not used my car for a week...as often happens now we have more company vehicles. Started instantly as usual....but went straight to tuner. I always have 8 gig USB stick in there that I leave on random play that fires up as soon as I start her up. I tried selecting the stick from the SRC button on the steering wheel...nothing...and I tried selecting it from the headunit....nothing. Its like its not plugged in. Last time this happened the USB stick had somehow gone corrupt and has lost about 800 tracks of music so easy to fix...so i tested it on my laptop and PC....played fine. Any ideas????