Header() Problem!

[Nik]

if (isset($_POST['prog1']))
{
mysql_query("UPDATE visitor SET button=button+1");
$sql = mysql_query("SELECT button FROM visitor");
$button = mysql_fetch_array($sql);

echo "<font face='Com' size='5' color='Grey'>Åßóáé ï <font size='6' color='Yellow'>" .$button[0]. "<font size='5' color='Grey'>ïò ðïõ êáôåâÜæåé ôï LogReader!<br>";
echo "<font face='Com' size='5' color='Grey'>Åëðßæù íá óïõ áñÝóåé êáé íá óïõ öáíåß ÷ñÞóéìï!!";

$url = "http://tigani.coderz.gr/~nik/LogReader.exe";
header("location: $url");

mail ("[e-mail]", "ÊÜðïéïò êáôÝâáóå ôï LogReader! ÊáôåâÜóìáôá: " .$button[0], "", "From: ");

}
?>

My problem is that the echo stuff before the header doensnt show up and insted header starts immediately. If, so how am i gonna display what i want to display before the header takes place?

Thank you!