Roamio, comcast Cable Card Problem

Brand new Roamio basic (2 days old) Paired old cable card from Tivo Hd and worked great for 1 day. Yesterday no channels showing and Roamio says no Cable Card inserted. Tried to reinsert multiple times no luck. Tivo Tech said get new cable card, which I did. Inserted and it showed up. Paired with Comcast but only get 4 network stations (Both in SD or HD) No other channels show up. Multiple calls to Comcast. One tech says they put the info in system and it drops out

Firmware on card updated to correct one when I inserted it

any ideas?? Ever heard of this

New card is Bad or just something at there head end.

Tivo HD worked fine for 5 yrs



What is the number to the Comcast problem solvers, further up the line from the regular Cable Card Pairing number

Thanks

Dan