zdravim neviem ci tu niekto ma nainstalovane forum vBulletin alebo nie ale v instalacii je potrebne zmenit config.php a jednou z mnohych veci ktore tam neviem je toto
// Optionally, PHP can be instructed to set connection paramaters by reading from the
// file named in 'ini_file'. Please use a full path to the file.
// Example:
// $config['Mysqli']['ini_file'] = 'c:\program files\MySQL\MySQL Server 4.1\my.ini';
$config['Mysqli']['ini_file'] = '';
neviem proste tu cestu