ممكن احد يطلع على كودي الخاص بالتسجيل يشوف شو المشكلة بليز

<form id="loginForm" name="loginForm" action="login-exec.php" method="post" onsubmit= "return validate_form(this)">
<tr><td>username:<input name="login" type="text" size= "15" maxlength="30" id="login"/></td></tr>
<tr><td>password:<input type="password" size ="15" maxlength="30" id="password" />
<input name="submit" type="submit" value="Login"><input name="clear" type="reset" value="clear"/></td></tr></form>
<tr><td><a href="register-form.php"> sinUp</a></table>

//Start session
session_start();

//Include database connection details
require_once('config.php');

//Array to store validation errors
$errmsg_arr = array();

//Validation error flag
$errflag = false;

//Connect to mysql server
$link = mysql_connect(DB_HOST, DB_USER, DB_PASSWORD);
if(!$link) {
die('Failed to connect to server: ' . mysql_error());
}

//Select database
$db = mysql_select_db(DB_DATABASE);
if(!$db) {
die("Unable to select database");
}

//Function to sanitize values received from the form. Prevents SQL injection
function clean($str) {
$str = @trim($str);
if(get_magic_quotes_gpc()) {
$str = stripslashes($str);
}
return mysql_real_escape_string($str);
}

//Sanitize the POST values

$login = clean($_POST['login']);
$password = clean($_POST['password']);

//Input Validations
if($login == '') {
$errmsg_arr[] = 'Login ID missing';
$errflag = true;
}
if($password == '') {
$errmsg_arr[] = 'Password missing';
$errflag = true;
}

ينفذ هذه في كل الحالات
//If there are input validations, redirect back to the login form
if($errflag) { 0
$_SESSION['ERRMSG_ARR'] = $errmsg_arr;
session_write_close();
header("location: index.php");
exit();
}

//Create query
$qry="SELECT * FROM user WHERE UserName='$login' AND PassWard='".md5($_POST['password'])."'";
$result=mysql_query($qry);

//Check whether the query was successful or not
if($result) {
if(mysql_num_rows($result) == 1) {
//Login Successful
session_regenerate_id();
$member = mysql_fetch_assoc($result);
$_SESSION['SESS_MEMBER_ID'] = $member['member_id'];
$_SESSION['SESS_FIRST_NAME'] = $member['firstname'];
$_SESSION['SESS_LAST_NAME'] = $member['lastname'];
session_write_close();
header("location: index-1.php");
exit();
}else {
//Login failed
header("location: login-failed.php");
exit();
}
}else {
die("Query failed");
}
?>

<?php