Codeigniter ปัญหากับ Localhost ตอนไม่ connect DB โค้ดสามารถรันได้ แต่พอ Connect ไปแล้วมันหายไปเลย

$db['default']['hostname'] = 'localhost';
$db['default']['username'] = 'root';
$db['default']['password'] = 'root';
$db['default']['database'] = '[font=Verdana]ไอตรงนี้แหละ พอใส่ปุ๊บปัญหามา ถ้าไม่ใส่ก็ไปต่อไม่ได้[/font]';
$db['default']['dbdriver'] = 'mysql';
$db['default']['dbprefix'] = '';
$db['default']['pconnect'] = TRUE;
$db['default']['db_debug'] = TRUE;
$db['default']['cache_on'] = FALSE;
$db['default']['cachedir'] = '';
$db['default']['char_set'] = 'utf8';
$db['default']['dbcollat'] = 'utf8_general_ci';
$db['default']['swap_pre'] = '';
$db['default']['autoinit'] = TRUE;
$db['default']['stricton'] = FALSE;