confused?? map does not load?

[monsterman]

I have a garmin Thailand ver9 map on an SD card which no longer seems to work on my NUVI ...I have not used either for some time the EU and UK maps are all working but Thai map will not load?????

what am i doing wrong , i reckon i have forgotten som

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[Fatlad]

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[Cruising]

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[monsterman]

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