Hi,
my xmltv is working fine (exept the fact that the <sub-tiltle> tag is still not working

) make sure that:
1. You point the TV-Server to the directory where your tv-guide.xml is
2. Hit Import
3. Go to Mappings, hit Load/Refresh.
4. Map your Channels
5. Hit save
6. Go back to Settings and hit Import again
at least that way it imports flawless on my machine.