PHP & MYSQL: using bcrypt hash and verifying password with database

I'm using Mr. Andrew Moore's method (How do you use bcrypt for hashing passwords in PHP?) of hashing user's password. What I did is I have a registration page and it uses

$bcrypt = new Bcrypt(12);
$pass = $_POST['password']; //register password field
$hash= $bcrypt->hash($pass);

// then inserts $hash into database with users registered email (I've checked my mysql database and it indeed has an hashed item

Then I have a login page, consisting of email and password fields. My thought is that email addresses are unique in my database. So with that in mind, I made a script where it check's users email address first, then if there is an existing one, verify the hash password with this

$bcrypt = new Bcrypt(12);

$email = $_POST['email']; //from login email field
$pass_l = $_POST['password']; // from login password field
$hash_1= $bcrypt->hash($pass_1);

$chk_email= $dbh->prepare("SELECT password FROM table WHERE email = ?");
$chk_email -> execute(array($email));

while($row = $chk_email->fetch(PDO::FETCH_ASSOC)){
    $chk_pass = $row['password']; //inside a while loop to get the password
    $pass_isGood = $bcrypt->verify($hash_1, $chk_pass);
    var_dump($pass_isGood); // I'm getting false

}

I'm not sure what I'm doing wrong, I'm supposed to get true. And I have set my tablefield to text or even varchar(256)