I tryed to update my BMW Nav. 4 (Zumo 660) today and something went very wrong. When I turn it on now, all I get is this message: "System software missing". And the unit can`t connect to my PC with USB cable any longer. So, I can`t do anything with it and I am desperate for help, since I and my motorbike are leaving for an 4 weeks Europe tour tomorrow. Please, is there someone who can help me fix this problem, since Garmin support are closed for the week-end.