When I came back from a trip overseas, I found that I am no longer getting any audio for WMFR Tac 2 on my BCD436HP scanner. All other Tac channels are good, the problem only seems to be with Tac 2 (37786). Am assuming that they moved it to TDMA.
I see that is active on sites 1-1, 2-2, and 3-3. It can also be heard on the West Metro Fire Rescue feed. I would make sure that you haven't avoided the talkgroup in the scanner and make sure that all the appropriate sites are being scanned.
The BCD436HP will handle TDMA automatically if they did switch, but it does not sound like they have switched.
I tend to use Mt Morrison for my West Metro feed. But I do have an image for Lookout mountain that I load into the GRE if I think its been kinda quiet.