메인에 최신글을 달았는데..
최신글이 나오긴나오는데 오류나서 따라나옵니다..

<!DOCTYPE html>

<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
<?
include_once("./bbs/_common.php");
include_once("$g4[path]/lib/latest.lib.php");

$g4["title"] = "";
?>
<head>
<meta charset="utf-8" />
<title></title>
</head>
<body>
<div id="include"><?=latest("q_latest_right", "notice", 4 , 32);?></div>
</body>
</html>

오류내용

Warning: Cannot modify header information - headers already sent by (output started at /www/travins_co_kr/index.html:4) in /www/travins_co_kr/bbs/common.php on line 8

Warning: Cannot modify header information - headers already sent by (output started at /www/travins_co_kr/index.html:4) in /www/travins_co_kr/bbs/lib/common.lib.php on line 98

Warning: Cannot modify header information - headers already sent by (output started at /www/travins_co_kr/index.html:4) in /www/travins_co_kr/bbs/lib/common.lib.php on line 98

Warning: Cannot modify header information - headers already sent by (output started at /www/travins_co_kr/index.html:4) in /www/travins_co_kr/bbs/lib/common.lib.php on line 98

잘못된이유와 해결책을 알고싶습니다..