Hi and welcome.
Not meaning to sound rude, but you HAVE followed the instructions for setup as per this page?: http://minnie.tuhs.org/twiki/bin/vie.../GuidedSetup30
Apologies if you have, but a couple of your comments regarding postcode and specific setup for you STB indicate to me that you probably haven't, or didn't understand/follow them the way they were intended. Following these instructions inputting:
a zip code of 03000
an area code of 003
selecting your first input source
choosing "Yes I have an external cable box"
and then selecting Victorian FTA digital (or similar)
This would have at least given you a list of channels (refer to the instruction screenshots on the above webpage link). Continuing further you then select an appropriate IR code that works with your box, provided one has been created for your specific brand of box.
It sounds to me like you have picked "A/V input" which is simply a generic one-channel input that was designed (actually it was originally suggested by yours truly!) for those with an internal PAL tuner that also wanted a generic A/V input to hook up a DVD player or a VCR or whatever to route the playing of tapes/discs through the TiVo and this option has no IR controlling capability.
Cheers
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