자동가입방지코드 엑박 으로 나오네요

euc-kr 에서 utf-8 로 파일변환했습니다.

근데 회원 가입창 에서 자동방지코드가 보이질 않구 엑박으로 나옴니다...

잘못된 접근이라구 자꾸 에러창 에 숫자 자꾸 나오구요,,,
그리구 메인 화면에...
Warning: Cannot modify header information - headers already sent by (output started at /home/hosting_users/fastercokr/www/index.php:1) in /home/hosting_users/fastercokr/www/head.sub.php on line 32

Warning: Cannot modify header information - headers already sent by (output started at /home/hosting_users/fastercokr/www/index.php:1) in /home/hosting_users/fastercokr/www/head.sub.php on line 34

Warning: Cannot modify header information - headers already sent by (output started at /home/hosting_users/fastercokr/www/index.php:1) in /home/hosting_users/fastercokr/www/head.sub.php on line 35

Warning: Cannot modify header information - headers already sent by (output started at /home/hosting_users/fastercokr/www/index.php:1) in /home/hosting_users/fastercokr/www/head.sub.php on line 36

Warning: Cannot modify header information - headers already sent by (output started at /home/hosting_users/fastercokr/www/index.php:1) in /home/hosting_users/fastercokr/www/head.sub.php on line 37

Warning: Cannot modify header information - headers already sent by (output started at /home/hosting_users/fastercokr/www/index.php:1) in /home/hosting_users/fastercokr/www/head.sub.php on line 38

------ head.sub.php 줄 내용 -------------------
// 캐쉬의 내용을 가져옴. 완전한지는 검증되지 않음
header("Content-Type: text/html; charset=$g4[charset]");
$gmnow = gmdate("D, d M Y H:i:s") . " GMT";
header("Expires: 0"); // rfc2616 - Section 14.21
header("Last-Modified: " . $gmnow);
header("Cache-Control: no-store, no-cache, must-revalidate"); // HTTP/1.1
header("Cache-Control: pre-check=0, post-check=0, max-age=0"); // HTTP/1.1
header("Pragma: no-cache"); // HTTP/1.0

---------------------------------------------------------------------------------
그리구..
회원로그인시..
Warning: Cannot modify header infomation - headers already sent by (output started at/home/hosting_users/fastercokr/www/common.php:1) in /home/hosting_users/fastercokr/www/lib/common/lib.php on line 98

Warning: Cannot modify header infomation - headers already sent by (output started at/home/hosting_users/fastercokr/www/common.php:1) in /home/hosting_users/fastercokr/www/lib/common/lib.php on line 98

순간 오류 문구가 나왔다가 사라져요..
------ www/lib/common/lib.php 줄내용입니다 -------
setcookie(md5($cookie_name), base64_encode($value), $g4[server_time] + $expire, '/', $g4[cookie_domain]);
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오류 나네욤....ㅠㅠ

자동가입방지코드 엑박 으로 나오네요 도움 부탁 드리겠습니다.