i did burn that img on 3 different burning software, but still it is not working, it keep telling me loading software that it and keep for 10 second and then the gps option gets gray out, i have to unplug it and then plug it back again to try it again , i have been doing this for a months now with no luck , my mkIII is 3-1/20 v 16 and i can't get it to read or upgrade to the new firmware help please thanks