This is a common issue, probably corrupt firmware in your unit and/or the sd card.
One solution is to visit C&C wireless and pay over $100 for a map update or even send them your unit for even more $. see http://www.finedrive-acc.com/shop.cart?action=ITEM&prod_id=F400-08CP
The other solution was to send it to Fine Digital but they closed their doors in the US so they no longer support us customers. Because of this I made a DVD with map >DVD updates the firmware in the unit and loads the last map >PC with a DVD drive and SD card reader to use it. you can find these DVDs on ebay for $18 which basically covers my costs only
Answers & Comments
This is a common issue, probably corrupt firmware in your unit and/or the sd card.
One solution is to visit C&C wireless and pay over $100 for a map update or even send them your unit for even more $. see http://www.finedrive-acc.com/shop.cart?action=ITEM&prod_id=F400-08CP
The other solution was to send it to Fine Digital but they closed their doors in the US so they no longer support us customers. Because of this I made a DVD with map >DVD updates the firmware in the unit and loads the last map >PC with a DVD drive and SD card reader to use it. you can find these DVDs on ebay for $18 which basically covers my costs only