Not sure if you have a compatible but I have one of the old C530
Street Pilots and it takes quite a bit of force to make them mate.
Just be careful not to put pressure on the screen. Also you can
check with Garmin and ask if the two are compatible. I assume the
windshield mount came with the GPS so it should be. Hope this
helps.
--
Lee US Army Retired
2004 Georgie Boy Cruise Master
Skype: lee.g.bray and logitech