Hi, I've just got a reconditioned 660 from Garmin as my old one died. I'm trying to update the maps via the USB cable (and also hopefully charge up the battery) but my PC won't "find" the unit and when I turn the Zumo on it says "close battery door".....but I can't close the battery door because the USB cable is there...grrrr Please help, the grinding of my teeth is affecting the dog! Thanks, Gail-force