I just bought a Garmin GPS map276cx and can not install Bob T's West Virginia Trails 2018 Public maps on the unit nor any of his others. I have installed Garmin Express and Basecamp yet no luck. do I need to install a Micro card? Can anyone help? I have gone as far as removing the programs from the computer and reinstalling them. I have a 62s and had no problems loading them on to it. Anyone near Galax,Va I would be glad to meet for help.