Slt,
essaye ça
\modules\News\comment.php
$qry = "SELECT u.uid, u.uname, u.email, c.sid, c.tid, c.reply_date, c.host_name, c.subject, c.comment, c.name AS postername
FROM ${prefix}_comments AS c LEFT JOIN ${user_prefix}_users AS u ON c.uid = u.uid
WHERE (((c.sid)=" . intval($story['sid']) . ") AND ((c.modul_name)='" . $module_name . "'))
ORDER BY `reply_date` DESC";
remplae DESC par ASC
http://www.commentcamarche.net/contents/sql/sqltri.php3 