팝업게시판 추가하는 과정에서요... 오류메세지의 의미를 좀..갈카주세요.

오류가 나는곳의 주소를 알려주시면 더 빠르고 정확하게 답변 받을 수 있습니다.

오류 주소 : http://nan592.com

Warning: main(../lib/cheditor4.lib.php) [function.main]: failed to open stream: No such file or directory in /home/hosting_users/nan5921/www/adm/popup_form.php on line 4

Warning: main() [function.include]: Failed opening '../lib/cheditor4.lib.php' for inclusion (include_path='.:/usr/local/lib/php') in /home/hosting_users/nan5921/www/adm/popup_form.php on line 4

Warning: Cannot modify header information - headers already sent by (output started at /home/hosting_users/nan5921/www/adm/popup_form.php:4) in /home/hosting_users/nan5921/www/head.sub.php on line 32

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Fatal error: Call to undefined function: cheditor1() in /home/hosting_users/nan5921/www/adm/popup_form.php on line 30


파일 첨부해 볼께요..
한번 봐 주셔요..
팝업관리게시판을 추가하고 팝업생성을 하려고 +를 누르면 이런 메세지가 나와요..
고수님들 좀 갈카주세요...

참고로 cheditor 디렉토리는 있는데 cheditor4는 없어요..
어케 해야하죠?