Garmin Nuvi 710T

[SatNav]

Hi, I have a Garmin Nuvi 710T Sat Nav. I read in your forums that you can only download so many POI's so I bought an" SD" card to download extra POI's. I Down Load your Speed Cams and the POI's into a folder I call "Speed Cams" I then click on Garmin POI'S Loader on my computer and in the box, instead of Garmin, I choose Download to "H" This seems to be the SD card and all goes well. I then start my satnav and click on "Proximity Points and put a tick in "Garmin Safety Cameras and Custom POIs. When I look in Points of Interest, I see all the POI's that came with the Sat Nav some time ago, when I click on Extras I see all the latest POI's I've put on yesterday. When I set off in my car, I can see all the POI's on the screen but after 100 yards or so my screen freezes. Will I have to take them all off, I go on holiday soon and I would like to see things like Disabled Parking places etc
The satnav works ok without the extra POI's The Firmware says it is the currant version.
Regards Sat Nav
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Satnav.

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