[RESOLVED] What's wrong with setcookie in my code?

[Zeuz]

Warning: Cannot modify header information - headers already sent by (output started at C:\AppServ\www\game.php:6) in C:\AppServ\www\Codes\Login.php on line 12

<?php require("Config.php"); ?>
<?php
mysql_connect($Connection, $Username, $Password) or die("Cannot connect to MySQL Server.");
mysql_select_db($Database) or die("Cannot find Database.");
$login = mysql_query("DELETE FROM sp_accounts WHERE Username=''");
?>
<?php
mysql_connect($Connection, $Username, $Password) or die("Cannot connect to MySQL Server.");
mysql_select_db($Database) or die("Cannot find Database.");
$login = mysql_query("SELECT * FROM sp_accounts WHERE Username='$_POST[Username]' AND Password='$_POST[Password]'");
if(mysql_affected_rows() == 1) {
    setcookie("Username", $_POST['Username'], time() + 8000);
echo "Login: OK!";
echo "<br />"; }
if(!isset($_cookie["Username"]) && !isset($_cookie["Password"])) {
    echo ("We can't find cookie: ");
    die('<a href="login.php">Try again.</a>');
    }
?>

Thank you for incoming answers.