Fatal Error bei Installation

Fatal error: PHP warning in file /var/www/web110/html/realmforum/forum/wcf/lib/acp/package/PackageInstallationQueue.class.php (510): file_exists() [<a href='function.file-exists'>function.file-exists</a>]: open_basedir restriction in effect. File(/options.inc.php) is not within the allowed path(s): (/var/www/web110/html/:/var/www/web110/phptmp/:/var/www/web110/files/:/var/www/web110/atd/)
   Information:
   error message: PHP warning in file /var/www/web110/html/realmforum/forum/wcf/lib/acp/package/PackageInstallationQueue.class.php (510): file_exists() [<a href='function.file-exists'>function.file-exists</a>]: open_basedir restriction in effect. File(/options.inc.php) is not within the allowed path(s): (/var/www/web110/html/:/var/www/web110/phptmp/:/var/www/web110/files/:/var/www/web110/atd/)
  php version: 5.2.0-8+etch15
 wcf version: 1.0.11 pl 1 (Horizon)
 file: /var/www/web110/html/realmforum/forum/wcf/lib/system/WCF.class.php (255)
 error code: 0
 date: 09/07/2009 09:05pm
 request: /acp/index.php?page=Package&step=finish&queueID=297&action=install&packageID=38&
 referer: http://www.durotan.net/acp/index.php?page=Package&step=optionals&queueID=297&action=install&packageID=38&
   Stacktrace:
 #0 [internal function]: WCF::handleError(2, 'file_exists() [...', '/var/www/web110...', 510, Array)
#1 /var/www/web110/html/realmforum/forum/wcf/lib/acp/package/PackageInstallationQueue.class.php(510): file_exists('/options.inc.ph...')
#2 /var/www/web110/html/realmforum/forum/wcf/lib/acp/package/PackageInstallation.class.php(365): PackageInstallationQueue->makeClear()
#3 /var/www/web110/html/realmforum/forum/wcf/lib/acp/package/PackageInstallation.class.php(301): PackageInstallation->finishInstallation()
#4 /var/www/web110/html/realmforum/forum/wcf/lib/acp/package/PackageInstallation.class.php(52): PackageInstallation->install()
#5 /var/www/web110/html/realmforum/forum/wcf/lib/acp/page/PackagePage.class.php(42): PackageInstallation->__construct(297)
#6 /var/www/web110/html/realmforum/forum/wcf/lib/page/AbstractPage.class.php(36): PackagePage->show()
#7 /var/www/web110/html/realmforum/forum/wcf/lib/util/RequestHandler.class.php(63): AbstractPage->__construct()
#8 /var/www/web110/html/realmforum/forum/wcf/lib/util/RequestHandler.class.php(91): RequestHandler->__construct('Package', Array, 'page')
#9 /var/www/web110/html/realmforum/forum/acp/index.php(8): RequestHandler::handle(Array)
#10 {main}
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