При добавлении новости такая ошибка. в чем может быть проблема?
Warning: preg_replace() [function.preg-replace]: Compilation failed: this version of PCRE is not compiled with PCRE_UTF8 support at offset 0 in /home/сайт.ru/www/classes/lib/external/Jevix/jevix.class.php on line 360

Warning: preg_match_all() [function.preg-match-all]: Compilation failed: this version of PCRE is not compiled with PCRE_UTF8 support at offset 0 in /home/сайт.ru/www/classes/lib/external/Jevix/jevix.class.php on line 344

Warning: Cannot modify header information — headers already sent by (output started at /home/сайт/www/classes/lib/external/Jevix/jevix.class.php:360) in /home/сайт.ru/www/include/function.php on line 181