علت این خطا

code :

<?php


// phpBB 2.x auto-generated config file
// Do not change anything in this file!

$dbms = 'phpbb1';

$dbhost = 'localhost';
$dbname = 'ebtekaro_phpbb1';
$dbuser = 'ebtekaro_phpbb1';
$dbpasswd = 'TvrfgbM';

$table_prefix = 'phpbb_';

define('PHPBB_INSTALLED', true);

?>
-----------------------------------------------این هم  config قبلی
<?php


// phpBB 2.x auto-generated config file
// Do not change anything in this file!

$dbms = 'mysql4';

$dbhost = 'localhost';
$dbname = 'ucurumne_phpbb1';
$dbuser = 'ucurumne_phpbb1';
$dbpasswd = 'TvrfgbM';

$table_prefix = 'phpbb_';

define('PHPBB_INSTALLED', true);

?>

code :

$dbms = 'mysql4';

code :

$dbms = 'phpbb1';