Yeah... The problem is not youre guide setup, its XMLTVNZ. The current version (of v2) is about 3months old. It hasnt been updated for a while due to XMLTVNZ 3.0 being developed. One of the major changes in this release is that you dont have to keep manually updating xmltvnz itself to be able to download data again (the sites the info is grabbed from keep getting updated to prevent this), XMLTVNZ3.0 will automatically pick up the new URL from the reven website as they change
Cheers,
Jourdan