Thanks man it works but i have only one thing more..
How dow i only print the usernams not the hole value
look i made this changes from your script!
<?php
include ("./management/mysqlcondbrr.php");
$result = mysql_query("SELECT username FROM reg_info ORDER BY regdate LIMIT 1",$starta);
$user['first']=mysql_fetch_assoc($result);
$result = mysql_query("SELECT username FROM reg_info ORDER BY regdate DESC LIMIT 1",$starta);
$user['last']=mysql_fetch_assoc($result);
echo '<pre>';
print_r($user);
echo '</pre>';
?>