La boucle while ne retourne rien

<body id="page-top" class="index">

 
    <section id="portfolio" class="bg-light-gray">
        <div class="container-fluid">
  <div class="col-lg-12 text-center">
         
 
<?php
require'connexion.php';
$conn=connex();
$login=isset($_POST['NomPrenom'])?$_POST['NomPrenom']:'';
$password=isset($_POST['password'])?$_POST['password']:'';

$var="SELECT * FROM table2 WHERE NomPrenom='$login' AND CIN='$password'";
$result = $conn->query($var) or die (print_r($conn->errorInfo()));
?>

    <div class="row">
        <div class="col-md-12">
            
            <h3 class="text-center">Bienvenue dans votre espace</h3> <br>
                
            
        </div>
        <div id="no-more-tables">
            <table class="col-md-12 table-bordered table-striped table-condensed cf">
                <thead class="cf">
                    <tr>
                        <th class="numeric">Id</th>
                        <th class="numeric">Nom et Prenom</th>
                        <th class="numeric">CIN</th>
                        <th class="numeric">Echelle</th>
                        <th class="numeric">Votre Demande</th>
                        <th class="numeric">validation</th>
                        
                    </tr>
                </thead>
                
<?php 
while($row=$result->fetch(PDO::FETCH_ASSOC)) 
{


?>

                    <tr>
                        <td><?php echo $row['Id']; ?></td>
                        <td><?php echo $row['NomPrenom']; ?></td>
                        <td><?php echo $row['CIN']; ?></td>
                        <td><?php echo $row['Echelle']; ?></td>
                        <td><?php echo $row['demande']; ?></td>
                        <td><?php echo $row['validation']; ?></td>

 
</tr>  
 
<?php
}
?>   
</table> 
       
   </div>          
         </div>      
        </div>
    </div>
    </section>
    </body>
    </html>