Fatal error: Unable to load cache resource 'cronjobs-38'

Information:

error message: Unable to load cache resource 'cronjobs-38'
error code: 0
file: /www/htdocs/seworld/wcf/lib/system/cache/CacheHandler.class.php (221)
php version: 5.2.6
wcf version: 1.0.10 (Horizon)
date: Tue, 02 Dec 2008 04:00:30 +0000
request: /index.php?page=Thread&threadID=159668&pageNo=2
referer:

Stacktrace:

#0 /www/htdocs/seworld/wcf/lib/system/cache/CacheHandler.class.php(196): CacheHandler->loadCacheFile(Array)
#1 /www/htdocs/seworld/wcf/lib/system/cache/CacheHandler.class.php(155): CacheHandler->load(Array)
#2 /www/htdocs/seworld/lib/system/WBBCore.class.php(73): CacheHandler->get('cronjobs-38', 'nextExec')
#3 /www/htdocs/seworld/lib/system/WBBCore.class.php(38): WBBCore->initCronjobs()
#4 /www/htdocs/seworld/wcf/lib/system/WCF.class.php(93): WBBCore->initTPL()
#5 /www/htdocs/seworld/global.php(18): WCF->__construct()
#6 /www/htdocs/seworld/index.php(7): require_once('/www/htdocs/sew...')
#7 {main}