3
No if it was the firewall, the first login would fail. Only if the message 'thank you for logging in' apprears, and the login box still shown, then it may be true. Also, the second login would fail as well...
I would like you to pay special attention to the URL of the site you are logging in to, and the URL to where it redirects (with a failed login). If the root url is different, make sure that the mainfile.php has the exact settings for XOOPS_ROOT_URL. For instance, if you log in on
http://www.yoursite.net, and it redirects to yoursite.net (without www), the system will not see you as logged in (because you logged in on
http://www.yoursite.net, not yoursite.net), and ask for you to login again. Because this time you are at yoursite.net, it will see you as logged in just fine.
I hope that makes sense.
Herko