Garmin GVN-53


I've tried loading some POI's into my Garmin GVN-53. When insert the SD card into the Black Box it asked me if I want to load new POI's. I say "yes" and it seems to load the POI's normally. The POI's are even listed in the POI data base of the Garmin but when I try to use one of the POI's in the "Go To" list it causes the GVN-53 to reboot and start from the begining. Does anybody have any ideas on what could be the problem?