I have a unit I got aftermarket and although I have US map DVD, I've tried 3 different addresses in Florida and none of them were found on the disk.

How do I know if my unit is up to snuff and have the latest DVD map?

My unit is 8P0919884 Q, SW-0200, HW H72.

Kind of frustrating to have a NAV unit that can't find addresses, even my own home which was built in 1981!