Crack, $total = mysql_result(mysql_query("SELECT COUNT(*) FROM `users` WHERE `preg` = '1';"), 0);
if ($total) {
$req = mysql_query("SELECT * FROM `users` WHERE `preg` = 1 ORDER BY `progn` DESC LIMIT " . $start . ", " . $kmess . ";");
И да мог бы переписать под 5хх