Just upgraded the Hard Drive on Series 3. Everything works fine except there is a cable card issue for just the premium channels. All other channels are working. Comcast can not figure it out. Says it is a Tivo problem (of course). I know they can do something over the phone. They are having trouble with the card numbers. Have to send a technician (will cost me). Any ideas re what I can tell them to do over the phone? The tech will be here and will call up someone who will tell him what to do. Then charge me. I have given them all the numbers that pop up on the screen. They say none of them work for them. Thanks.