Hello everyone. I've just upgraded from the Montana 650t to the New Montana 750i, I've taken the Micro SD card North America and Europe NT maps out and put in the New Montana 750i but they aren't showing on the screen. I get an error message stating I should contact the manufacturer. I have an older locally produced Japan map that I purchased from a Japanese map producer and the map works fine in my new Montana 750i and it is dated 2011 as well as my other two maps. I've done all the usual things like switch on off, remove SD card, disabled the built-in maps but still no luck. Anyone have any advice? Thank you.