Only 3 hours of programme guide data

I've just set up my networked tivo to use AltEPG today (thanks for all the effort that everyone has put into this!).
However, after several forced daily calls, I still have only a few hours of guide data showing - I haven't seen anything past 1am (BST) tomorrow (which is midnight, GMT). Also, some channes have no data at all (notably Sky1 and Sky2, which I believe are supported).
I'm sure that I saw some guide data for later dates when I first looked at it earlier today, but right now (~10pm) I have only 3 hours of programme info.
Is this a recognised problem?
The only unusual thing that happened during guided setup was that the TiVo insisted that there was no incoming signal when I got to the (Virgin Media) set-top box setup section (even though the signal was definitely present and visible using the TiVo's "Aux" bypass). A reboot didn't fix this, and I had to power down and cold boot the TiVo and set top box. This fixed the "no incoming signal" problem, but I wonder if it might have affected the guide data unpacking process.
Any suggestions?
Thanks
gvm
However, after several forced daily calls, I still have only a few hours of guide data showing - I haven't seen anything past 1am (BST) tomorrow (which is midnight, GMT). Also, some channes have no data at all (notably Sky1 and Sky2, which I believe are supported).
I'm sure that I saw some guide data for later dates when I first looked at it earlier today, but right now (~10pm) I have only 3 hours of programme info.
Is this a recognised problem?
The only unusual thing that happened during guided setup was that the TiVo insisted that there was no incoming signal when I got to the (Virgin Media) set-top box setup section (even though the signal was definitely present and visible using the TiVo's "Aux" bypass). A reboot didn't fix this, and I had to power down and cold boot the TiVo and set top box. This fixed the "no incoming signal" problem, but I wonder if it might have affected the guide data unpacking process.
Any suggestions?
Thanks
gvm