vBulletin 4.2.x Kurulum sonrası sorun

vBulletin 4.2.x kurdum en son versiyon ancak siteye baktığımda problem var aldığım hatalar aşağıdaki gibi
nasıl çözebilirim

henüz herhangi bir eklenti eklemedim vbulletin kendi kurulumuyla gelen eklentiler var config.php içinden eklentileri pasifleştirme fonksiyonunu girdiğimde siteyi görütüliye biliyorum

Warning: date() [function.date]: It is not safe to rely on the system's timezone settings. Please use the date.timezone setting, the TZ environment variable or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Chicago' for 'CST/-6.0/no DST' instead in ..../includes/functions.php on line 4912

Warning: date() [function.date]: It is not safe to rely on the system's timezone settings. Please use the date.timezone setting, the TZ environment variable or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Chicago' for 'CST/-6.0/no DST' instead in ..../includes/functions.php on line 5104

Warning: date() [function.date]: It is not safe to rely on the system's timezone settings. Please use the date.timezone setting, the TZ environment variable or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Chicago' for 'CST/-6.0/no DST' instead in ..../includes/functions.php on line 5104

Warning: date() [function.date]: It is not safe to rely on the system's timezone settings. Please use the date.timezone setting, the TZ environment variable or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Chicago' for 'CST/-6.0/no DST' instead in ..../includes/functions.php on line 5104
Unable to add cookies, header already sent.
File: /home/cPanelKullanıcıAdı/public_html/forum/includes/class_core.php
Line: 5755

aynı sorun bendede var

Çünkü sunucudaki Php ayarlarında zaman birimi konfigüre edilmemiş. Php.ini'den bunu yapabilirsiniz. Config.php açın ve şu kodu ekleyin;

define('SKIP_ALL_ERRORS', true);