从本地主机到UK2 -我的登录脚本不再工作

我花了几个月的时间在我的电脑上创建了一个本地网站。我现在已经购买了一个域名，并上传了我的文件和数据库。

由于某种我想不起来的原因，用户不能再登录网站了——我也用UK2.net检查了我的登录凭据，他们说他们都是正确的。

可能出了什么问题?

登录表单:

<form action="login.php" method="post" >
    Email<br />
    <input name="email" type="text" /><br /><br />
    Password<br />
    <input name="password" type="password" /><br />
    <input name="submit" type="submit" value="Log In" />
</form>

登录PHP:

require_once('/scripts/includePDO.php');
$error = '';
$form = $_POST['submit'];
$email = $_POST['email'];
$password = $_POST['password'];
if( isset($form) ) {
if( isset($email) && isset($password) && $email !== '' && $password !== '' ) {
$sql = "SELECT * FROM tbl_users WHERE email = :email and password = :password";
$q   = $conn->prepare($sql); // the default way of PDO to manage errors is quite the same as `or die()` so no need for that
        $q->bindValue(':email',$email,PDO::PARAM_STR);
        $q->bindValue(':password',$password,PDO::PARAM_STR);
        $q->execute();
            $r = $q->fetch(PDO::FETCH_ASSOC);
            if(($r)!=0)
{ //success
$answer = $r['id'];
$_SESSION['logged-in'] = true;
$_SESSION['who'] = $answer;
//If the login details are entered and they match those in the database, forward to new page.
header('Location: /home/');
exit;
// If information is wrong or missing, provide error message.
} else { echo "Sorry, something hasn't worked. Are you entering all the information correctly?"; }
} 
}