Satellite and Cable TV

I have comcast digital cable and I am suscribed to all the basic, expanded, digital classic, digital plus, and HBO premium channels. I recently upgraded to the high def DVR box, and moved the old cable box into my bedroom. So now my living room has the DVR box, and my bedroom has the basic digital box which used to be in my living room. Each cable is split from the one cable jack that we have in the living room. For a few days the bedroom cable was working fine, but now I don't get the expanded channels(29-73) or the HBO channels(300-312). I tried unplugging and restarting the bedroom cable box but I still can't get the channels. It only says "Suscription Service...for ordering info press INFO..." and that's it. Comcast customer service is clueless, so I was hoping somebody here might have an idea what is going on. Why was I getting the channels a couple days ago, but not anymore? And remember, my living room DVR box does still get all the correct channels.

Thanks.