HÝ
I've downloaded mysql 4.1
and i've done all the configurations
but when i type
<?php

$connect=mysql_connect("localhost","root","h034013 41");
?>
in a php file
there is
Warning: mysql_connect(): Client does not support authentication protocol requested by server; consider upgrading MySQL client in C:\Program Files\Apache Group\Apache2\test\mys.php on line 3
on the browser

You need to convert the root mysql password to the old password format..

Have a read of http://dev.mysql.com/doc/refman/4.1/en/old-client.html for more information.