Fatal error: PHP notice in file /usr/local/httpd/htdocs/178/93/wbb/wcf/lib/system/session/CookieSessionFactory.class.php (121): Use of undefined constant COOKIE_PREFIX - assumed 'COOKIE_PREFIX'

Information:

error message: PHP notice in file /usr/local/httpd/htdocs/178/93/wbb/wcf/lib/system/session/CookieSessionFactory.class.php (121): Use of undefined constant COOKIE_PREFIX - assumed 'COOKIE_PREFIX'
error code: 0
file: /usr/local/httpd/htdocs/178/93/wbb/wcf/lib/system/WCF.class.php (255)
php version: 5.2.17
wcf version: 1.0.11 pl 3 (Horizon)
date: Mon, 21 Apr 2014 07:04:18 +0000
request: /wbb/index.php?page=Thread&threadID=57661
referer:

Stacktrace:

#0 /usr/local/httpd/htdocs/178/93/wbb/wcf/lib/system/session/CookieSessionFactory.class.php(121): WCF::handleError(8, 'Use of undefine...', '/usr/local/http...', 121, Array)
#1 /usr/local/httpd/htdocs/178/93/wbb/wcf/lib/system/session/SessionFactory.class.php(61): CookieSessionFactory->readSessionID()
#2 /usr/local/httpd/htdocs/178/93/wbb/lib/system/WBBCore.class.php(201): SessionFactory->get()
#3 /usr/local/httpd/htdocs/178/93/wbb/wcf/lib/system/WCF.class.php(91): WBBCore->initSession()
#4 /usr/local/httpd/htdocs/178/93/wbb/global.php(18): WCF->__construct()
#5 /usr/local/httpd/htdocs/178/93/wbb/index.php(7): require_once('/usr/local/http...')
#6 {main}