Have we now determined that you are not using the Hauppauge remote for anything?
We have determined that the cable remote works normally?
Is there a need for you to set up Media Center to work with more that one tuner/channel? I am still a little confused by what is the device being referred to as the IR receiver, but if Media Center does not need to change the channel, I do not see why you get the message, unless the setup is not being handled correctly. Does the Media Center setup give you the ability to change channels or select content through it?
Does your computer have a hard wire cable or an IR port or transmitter that could be used to change the channels on the cable box?
Sorry about the questions, and I know I am probably just aggravating you, but I cannot remember the requirements/procedures for setting this up. I do have a TV card I have not yet added to my install, but I might try that tonight. My content will come from a Satellite box, which really should not make a difference.