아웃로그인, 로그 아웃하면.....

<?
$g4_path="a";
include_once("a/common.php");
include_once("$g4[path]/head.sub.php");
include_once("$g4[path]/lib/outlogin.lib.php");
include_once("$g4[path]/lib/latest.lib.php");

?>

top 페이지에서 로그인 스킨을 불러들이고
body 페이지에서 top페이지를 include 시켰습니다.
그리고 body 페이지 상단에 위 소스를 넣었습니다.
로그인은 됩니다.
로그 아웃을 하면, 로그아웃은 먹히는데 빈페이지에 아래와 같은 내용이 나타납니다.
왜그런가요.....

Warning: include_once(../gnuboard4/_common.php) [function.include-once]: failed to open stream: No such file or directory in /home/hosting_users/blueye03/www/a/index.php on line 2

Warning: include_once() [function.include]: Failed opening '../gnuboard4/_common.php' for inclusion (include_path='.:/usr/local/lib/php') in /home/hosting_users/blueye03/www/a/index.php on line 2

Warning: include_once(../gnuboard4//lib/latest.lib.php) [function.include-once]: failed to open stream: No such file or directory in /home/hosting_users/blueye03/www/a/index.php on line 3

Warning: include_once() [function.include]: Failed opening '../gnuboard4//lib/latest.lib.php' for inclusion (include_path='.:/usr/local/lib/php') in /home/hosting_users/blueye03/www/a/index.php on line 3

Warning: include_once(../gnuboard4/_head.php) [function.include-once]: failed to open stream: No such file or directory in /home/hosting_users/blueye03/www/a/index.php on line 6

Warning: include_once() [function.include]: Failed opening '../gnuboard4/_head.php' for inclusion (include_path='.:/usr/local/lib/php') in /home/hosting_users/blueye03/www/a/index.php on line 6

Fatal error: Call to undefined function sql_query() in /home/hosting_users/blueye03/www/a/index.php on line 14