guide data in 12.04

[paenian]

I've installed mythtv, and had it auto-add my TV tuner (dvico hdtv card), but it never populates the channels.  I'm using SchedulesDirect.

The core gets to SchedulesDirect to check my lineups and downloads them, but no channels.  If I run mythfilldatabase manually, it runs a while but still no channels.

If I go into the mythtv setup (through the mce frontend), the tuners are set up correctly, with the right listings.  However, if I ask it to 'fetch channels from the listing source' it returns immediately - no delay, doesn't seem to be any attempt to fetch.

Any ideas?

Thanks,
Paul