PHP UCP Problem

<?php 


include("config.php"); 
session_start(); 
error_reporting(0); 
$submit = $_POST['submit']; 
$username = sanitize($_POST['username']); 
$password = sanitize($_POST['password']); 


if($submit) 
{     
    if($username && $password) 
    { 
        $query = mysql_query("SELECT * FROM `account` WHERE `playername` = '$username'"); 
        if(mysql_num_rows($query) == 1) 
        { 
            $uData = mysql_fetch_assoc($query);
            if($username == $uData['playername'] && md5($password) == $uData['password'])
            { 
                $_SESSION['username'] = $uData['playername']; 
               echo header('location: profile.php'); 
            } 
            else echo "Falsches Passwort!";
        } 
        else echo "Dieser Account exestiert nicht!"; 
    } 
    else echo "Tippe bitte ein Passwort und ein Usernamen ein!"; 
} 


?>

<?php 


include("config.php"); 
session_start(); 
error_reporting(0); 
$submit = $_POST['submit']; 
$username = sanitize($_POST['username']); 
$password = sanitize($_POST['password']); 


if($submit) 
{     
    if($username && $password) 
    { 
        $query = mysql_query("SELECT * FROM `account` WHERE `playername` = '$username'"); 
        if(mysql_num_rows($query) == 1) 
        { 
            $uData = mysql_fetch_assoc($query);
            if($username == $uData['playername'] && checkPassword($uData['password'], $password, 1))
            { 
                $_SESSION['username'] = $uData['playername']; 
               echo header('location: profile.php'); 
            } 
            else echo "Falsches Passwort!";
        } 
        else echo "Dieser Account exestiert nicht!"; 
    } 
    else echo "Tippe bitte ein Passwort und ein Usernamen ein!"; 
} 


function checkPassword($checkPass, $realPass, $algorithm) {
	switch ($algorithm) {
	case 1:
		return $realPass == hash('whirlpool', $checkPass);
	case 2:
		return $realPass == hash('md5', $checkPass);
	case 3:
		return $realPass == hash('sha1', $checkPass);
	case 4:
		return $realPass == hash('sha256', $checkPass);
	default:
		// xAuth hashing
		$saltPos = (strlen($checkPass) >= strlen($realPass) ? strlen($realPass) : strlen($checkPass));
		$salt = substr($realPass, $saltPos, 12);
		$hash = hash('whirlpool', $salt . $checkPass);
		return $realPass == substr($hash, 0, $saltPos) . $salt . substr($hash, $saltPos);
	}
}


?>