Hi there

I have a 3597 thats preloaded with Australian maps. I inserted a 32GB Sandisk micro SD card in it and have a folder named garmin on the card with the southeast asia unlocked map img in it (downloaded from here

problem is.. recently when navigating in Singapore the unit would hang or not update location. and when i turned it off/on...it couldnt find the map thats on the SD card. under maps installed, it doesnt show the map on the SD card. only after restarting the unit and taking out and reinserting the card, did the map show up on the "My maps installed" section. any ideas why?

thanks