[mythtv-users] Comcast clear QAM

[Jeff Thurston]

Hello, I live in the SF Bay Area and have Comcast, I can get clear QAM
channels in HD just fine with my TV directly, 
as well as through firewire on my DCH-3200 STB (Except for HD CBS or FOX
anyone know why?).
Recently I purchased a Hauppauge HVR1250, I added my ComcastDigital Lineup
to the card and performed a channel scan. 
The scan finds a ton of encrypted channels, others with no tables, and then
the usual clear QAM versions of the local broadcasters.
My problem is that when I try to watch any of the clear QAM channels, Myth
won't get a lock. The only channel I seem to get on the HVR-1250 is PBS-HD. 
The DCH-3200/Firewire still works just fine.

What am I doing wrong?? Is it even possible to use the same lineup for two
sources of the same content? - DCH-3200 & HVR-1250 ?

Thanks for the help!