I don't see where to change that at??
look below:

} else {
if ($attachmentid and !$foruminfo[moderateattach]) {
$DB_site->query("UPDATE thread SET attach = attach + 1 WHERE threadid = '$threadid'");
}
$DB_site->query("INSERT INTO post (postid,threadid,title,username,userid,dateline,at tachmentid,pagetext,allowsmili e,showsignature,ipaddress,iconid,visible) VALUES (NULL,'$threadid','".addslashes(htmlspecialchars($ title))."','".addslashes(htmls pecialchars($postusername))."','$bbuserinfo[userid]','".time()."','$attachmentid','".addslashes($mess age)."','$allowsmilie','$signa ture','$ipaddress','$iconid','$visible')");
$postid=$DB_site->insert_id();

indexpost($postid,0);

if ($visible) {
if ($threadinfo[replycount]%10==0) {
$replies=$DB_site->query_first("SELECT COUNT(*)-1 AS replies FROM post WHERE threadid='$threadid'");
$DB_site->query("UPDATE thread SET lastpost='".time()."',replycount='$replies[replies]',lastposter='".addslashes($bbuserinfo[username])."' WHERE threadid='$threadid'");
} else {
$DB_site->query("UPDATE thread SET lastpost='".time()."',replycount=replycount+1,last poster='".addslashes($bbuserin fo[username])."' WHERE threadid='$threadid'");
}
}