_head.php 和 lib.php的?>前面里添加底下的

ini_set('register_globals','1');
ini_set('session.bug_compat_42','1');
ini_set('session.bug_compat_warn','0');
ini_set('session.auto_start','1');

如果还是不行就加

if(count($HTTP_GET_VARS)){extract($HTTP_GET_VARS);}
if(count($HTTP_POST_VARS)){extract($HTTP_POST_VARS);}
$PHP_SELF=$HTTP_SERVER_VARS[PHP_SELF];
$HTTP_REFERER=$HTTP_SERVER_VARS[HTTP_REFERER];
$REMOTE_ADDR=$HTTP_SERVER_VARS[REMOTE_ADDR];