2
This is because XOOPS checks the referral URL (the URL of the site the user logged in on), with the URL of the XOOPS site you are on. The solution is to put the real URL (not the redirect URL) in the mainfile.php configuration.
Herko
p.s. I have had a hard talk with Manolis about the XOOPS Greece issue, and have removed the XOOPS Greece site from the Partners list. If any Greeks are willing to pick up where he left, contact me!