The WIBU-Key drivers that weren't working were installed from the Archicad 9 and/or 11 setup. Apparently, these are 32 bit drivers. After contacting WIBU tech support, based on their recommendations, I uninstalled what came with Archicad and reinstalled 64 bit compatible drivers from WIBU's website and this worked.
If anyone else needs the 64 bit drivers, the following is the link:
http://wibu.com/download_user.php