Login menggunakan md5

mau nanya masalah koneksi ke mysql tidak bisa membaca password md5

<?php
$koneksi = mysqli_connect("localhost","root","","spareparts");

// Check connection
if (mysqli_connect_errno()){
	echo "Koneksi database gagal : " . mysqli_connect_error();
}

?>

<link rel="stylesheet" href="css/sweet_alert/sweetalert.css">
<?php
// mengaktifkan session pada php
session_start();

// menghubungkan php dengan koneksi database
include 'koneksi.php';

// menangkap data yang dikirim dari form login
$username = $_POST['username'];
$password = md5($_POST['password']);

// menyeleksi data user dengan username dan password yang sesuai
$login = mysqli_query($koneksi,"select * from m_admin where username='$username' and password='$password'");
// menghitung jumlah data yang ditemukan
$cek = mysqli_num_rows($login);

// cek apakah username dan password di temukan pada database
if($cek > 0){

  $data = mysqli_fetch_assoc($login);

  // cek jika user login sebagai admin
  if($data['level']=="admin"){

    // buat session login dan username
    $_SESSION['username'] = $username;
    $_SESSION['level'] = "admin";
    // alihkan ke halaman dashboard admin


     echo "
  <script type='text/javascript'>
  setTimeout(function () {

    swal({
            title: 'welcome dear',
            text:  '$username',
            type: 'success',
            timer: 3000,
            showConfirmButton: true
        });
  },10);
  window.setTimeout(function(){
    window.location.replace('admin/index.php');
  } ,3000);
  </script>";

  // cek jika user login sebagai pegawai
  }else if($data['level']=="client"){
    // buat session login dan username
    $_SESSION['username'] = $username;
    $_SESSION['level'] = "client";
    // alihkan ke halaman dashboard pegawai


     echo "
  <script type='text/javascript'>
  setTimeout(function () {

    swal({
            title: 'welcome dear',
            text:  '$username',
            type: 'success',
            timer: 3000,
            showConfirmButton: true
        });
  },10);
  window.setTimeout(function(){
    window.location.replace('client/index');
  } ,3000);
  </script>";

  // cek jika user login sebagai pengurus
  }else if($data['level']=="inventory"){
    // buat session login dan username
    $_SESSION['username'] = $username;
    $_SESSION['level'] = "inventory";
    // alihkan ke halaman dashboard pengurus


   echo "
  <script type='text/javascript'>
  setTimeout(function () {

    swal({
            title: 'welcome dear',
            text:  '$username',
            type: 'success',
            timer: 3000,
            showConfirmButton: true
        });
  },10);
  window.setTimeout(function(){
    window.location.replace('inventory/index');
  } ,3000);
  </script>";

  }else{

    // alihkan ke halaman login kembali
    echo "
  <script type='text/javascript'>
  setTimeout(function () {

    swal({
            title: 'the username or password you entered is incorrect',
            text:  '$username',
            type: 'error',
            timer: 3000,
            showConfirmButton: true
        });
  },10);
  window.setTimeout(function(){
    window.location.replace('index');
  } ,3000);
  </script>";
  }


}else{
  echo "
  <script type='text/javascript'>
  setTimeout(function () {

    swal({
            title: 'connection problem',
            text:  '$username',
            type: 'error',
            timer: 3000,
            showConfirmButton: true
        });
  },10);
  window.setTimeout(function(){
    window.location.replace('index');
  } ,3000);
  </script>";
}

?>

<script type="text/javascript" src="js/plugins/sweet_alert/jquery-1.9.1.min.js"></script>
<script src="js/plugins/sweet_alert/sweetalert.min.js"></script>
<script src="js/plugins/sweet_alert/qunit-1.18.0.js"></script>