어드민에서 접속통계나 설문조사 텝으로 들어가 지지가 않는군요

Warning: Attempt to assign property of non-object in /home/hosting_users/blade0773/www/classes/db/DB.class.php on line 281

Warning: Cannot modify header information - headers already sent by (output started at /home/hosting_users/blade0773/www/classes/db/DB.class.php:281) in /home/hosting_users/blade0773/www/classes/display/DisplayHandler.class.php on line 346

라는 오류메시지만 꾸역꾸역 내놓고 있는데..

어떻게 해야하나요