thanks for all your answers but im running in trouble i have put 3.40 there flashed fine. but cards on sd card saying cannot unlock maps. i tried even unlock locked map from [Only registered and activated users can see links. ] post 10 with gimgunlock+mapsigpatch from here and unlock was success. but it fails to read from sd card.
is my unit not down gradable?
what else i can try ?
regards TM