Thanks, CraZi4TV and all others who commented. The Comcast Tech is still not able to have my card activated. He also tried another card, but no luck. I called the Tivo Hotline and he conferenced Comcast. The Comcast technician was very patient and helpful, but she was not able to pair the card. The Tivo tech tried everything, but neither slot would work. At this point the Comcast tech is supposed to come back with another card to try. Later: The Comcast tech came back and tried another number at Comcast. He seemed to think the card was fine, but it just wasn't being activated correctly. Whoever he called said they wouldn't be able to help until after 8PM tonight. He said he would try it again tomorrow and let me know. If the cablecard can't be activated, will the hd digital channels still come thru the Tivo, or would I have to use an adapter? Right now, I can receive the regular hd channels, but not the premium channels. Anyone know?