Kwikset SmartCode 916 is not pairing with Smartthings

I was able to integrate my SmartCode™ 916 Touchscreen Electronic Deadbolt with HomeConnect™ technology to my Smartthings hub on the first try using the Kwikset sync button on the inside of the lock. My Smartthings hub is about 15 feet from the door lock. I am using the User Lock Manager v3.5 Copyright 2015 Erik Thayer to monitor & control the lock.

The door lock responds to my control commands within 1-2 seconds of touching the Unlock/Lock tile on my iPhone.