Cablecard not authorized after service transfer to new address
I moved and transferred my Xfinity TV and Internet service to a new address last week. We're using all of the same equipment from the original address, which worked perfectly there. However the Cablecard (in a Tivo) is no longer able to get channel authorizations. Internet modem and two DTAs are all working fine. Tivo reports it is able to tune to channels (90%+ signal strength on all tuners), but reports no authorization from the Cablecard.
I have followed the steps on www.xfinity.com/activatecablecard without success. The website correctly shows the serial number is already paired with the Tivo's Host and Data IDs. Attempting to repair results in this error, "We're sorry - an error has occurred. Your CableCARD was not paired with your device."
A tech was out today and basically suggested that the Cablecard technology is too old to work, and left. However, it was working fine last week until the transfer happened.
When I look at the devices section in my account (https://customer.xfinity.com/#/devices) the Cablecard is listed a "TV Box" rather than a "Cablecard". I'm suspicious that this miscategorization may be causing the authorization issue.
Any help that anyone here can provide would be much appreciated. Thanks!