When I hit the next bottom the page just reload.
It's XOOPS version 2.0.7.3

Here's the log:

[Tue Nov 23 23:20:56 2004] [notice] Apache/2.0.50 (FreeBSD) PHP/5.0.0 DAV/2 configured -- resuming normal operations
[client 195.24.1.195] PHP Notice: Use of undefined constant XOOPS_ROOT_PATH - assumed 'XOOPS_ROOT_PATH' in /hosting/www/jochke.dk/header.php on line 28
[client 195.24.1.195] PHP Warning: main(XOOPS_ROOT_PATH/class/xoopsblock.php) [function.main]: failed to open stream: No such file or directory in /hosting/www/jochke.dk/header.php on line 28
[client 195.24.1.195] PHP Warning: main() [function.include]: Failed opening 'XOOPS_ROOT_PATH/class/xoopsblock.php' for inclusion (include_path='.:') in /hosting/www/jochke.dk/header.php on line 28
[client 195.24.1.195] PHP Notice: Undefined variable: xoopsConfig in /hosting/www/jochke.dk/header.php on line 29
[client 195.24.1.195] PHP Notice: Use of undefined constant XOOPS_THEME_PATH - assumed 'XOOPS_THEME_PATH' in /hosting/www/jochke.dk/header.php on line 29
[client 195.24.1.195] PHP Notice: Undefined variable: xoopsConfig in /hosting/www/jochke.dk/header.php on line 29
[client 195.24.1.195] PHP Notice: Use of undefined constant XOOPS_ROOT_PATH - assumed 'XOOPS_ROOT_PATH' in /hosting/www/jochke.dk/header.php on line 62
[client 195.24.1.195] PHP Warning: main(XOOPS_ROOT_PATH/class/template.php) [function.main]: failed to open stream: No such file or directory in /hosting/www/jochke.dk/header.php on line 62
[client 195.24.1.195] PHP Fatal error: main() [function.require]: Failed opening required 'XOOPS_ROOT_PATH/class/template.php' (include_path='.:') in /hosting/www/jochke.dk/header.php on line 62