I recently updated Home to 2.8 and bought new US maps (1 yr). Maps downloaded after 3 "timed out" tries. I thought everything was fine until today when I tried to make a map correction and Home will not recognize to TT. When I connect to the computer, the charge light comes on but the word "Device" at the top left of Home page does not darken as usual. Try as I may I can't get Home to see the TT. I have removed the card and tried w/o it and it still doesn't recognize the TT. Any suggestions?