Did you download the VZ Manager for the DInc specifically or a generic one? I know they come packaged with different drivers.
Also, and I know this requires another dreaded re-install, but after uninstalling the VZM App, look in device manager and see if the phone is listed under modems or network adaptors. If it is delete it. Then try again, connecting the phone when prompted.
Just to be safe, after uninstalling and deleting the device from device manager a reboot would not hurt before re-installing.
Let us know how it works!