Connexion PhP erreur SQL

<?php 

 $host = 'localhost'; 
 $user = 'inscription'; 
 $pass = 'y2V3TPPZhCAAMYp9'; 
 $db = 'comptes'; 
 $pseudoconn = (htmlentities($_POST['pseudoconnexion']));
 $mdpconn = (htmlentities(sha1($_POST['passwordconnexion'])));

$link = mysql_connect ($host,$user,$pass) or die ('Erreur : '.mysql_error());
 mysql_select_db($db) or die ('Erreur :'.mysql_error());
 


 $sqle = mysql_query("SELECT * FROM infos_compte WHERE passe='". $mdpconn ."' AND pseudo='". $pseudoconn ."'") or die ('Erreur, impossible de vérifier la correspondance pseudo/mot de passe.');
  $requeteconn = mysql_query($sqle) or die( mysql_error() ) ;

$count_cores = mysql_num_rows($requeteconn);
if($count_cores === 1)
{
    session_start();
	
    $_SESSION['pseudo'] = $pseudo1;
    echo 'Vous êtes connecté !';
	echo 'Bonjour ' . $_SESSION['pseudo'];


}
else {
	echo "erreur";
}


?>