if you have an unlocked img you dont need a gmapsupp.unl -try to delete it-
if it's locked send it to C: Garmin and try to unlock it with this before copying to your device [Only registered and activated users can see links. ]
To determine your current installed Software and GPS Software Versions go to Main Menu->Setup->About... You should see a screen that looks like this which will display both your Software and GPS Software version number.
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