i am trying to use tomtom navigator 7 on my newly updated saga. when i set it to use built in gps it says there is no gps device. when i use "other NMEA GPS receiver" and i select com9: it says there is a gps device but there is no signal. i am sitting out in the middle of a field when i try this. i have also used gps test and the little icon thing stayed yellow and i didst get any reception. i have also tried Google maps and it also doesn't work. please can anyone help i have been waiting for months to get the gps update and now i cant use it