usb hangups

[Stocky58]

I have had a couple of issues with my usb connection. When I listen to music via usb flash drive and ask it to shuffle music it will do as instructed. But when I the car again, lets say next morning and want to listen to music it will not play. Not only that it also interferes with the phone bluetooth connection. As soon as I remove the stick Bluetooth functions again. I have tried everything from a 2gB - 16gB usb stick. If I just select albumns to play there is never any issue. Has anyone encountered this problem. Forgot it is a 2010 MB Zetec TDCI. Thanking you in advance.