les données de ma requête ne s'affichent pas !

mysql_connect('monserveur', 'monusername', 'monpasse');
mysql_select_db('mabase');
$Resultats = mysql_query("SELECT * from notes where Num='".$Numero."'");
$res = mysql_num_rows($Resultats);
			 
if($res!=1)
{
echo"<center><font color=red size=10><b><br><br><br><br>";
echo" Ce numéro n'existe pas";
}
else{
	
	
				echo "<center>";
			 
			 
			 $note = mysql_fetch_assoc($Resultats);
				 
			 echo"<br>";
          echo"<b><font color=red size=4>Nom et prénom:";echo"</font>";
 
echo"<TD bgcolor=yellow><font color=red size=4>
<b>".$note["Nom"]."</TD>";
 
echo "<br>";echo "<br>";echo"</font>";
echo"<b><font color=red size=4>Numéro:";echo"</font>";
 
echo"<TD bgcolor=yellow><font color=#114785 size=4>".$note["num_ex"]."</TD>";echo "<br>";echo "<br>";
 
echo "<TABLE Border=1 bordercolor=\"#095499\" CellSpacing=0>";
 
                   echo "<TR>";
			
		   echo "<TD><B>Sciences</B></TD>";
                   echo "<TD><B>Physique </B></TD>";
                   echo "<TD><B>Maths</B></TD>";
		   echo "<TD><B>Français</B></TD>";
		   echo "<TD><B>EPS</TD>";
		   echo "<TD><B>His</B></TD>";
		   echo "<TD><B>Moyenne</B></TD>";
 
                   echo "</TR>";
		   
		   	while ($note = mysql_fetch_assoc($Resultats))		
 
		   {
		   
             echo "<TR>";
              echo "<TD><center>".$note["Sci"]."</TD>";
               echo "<TD><center>".$note["Phy"]."</TD>";
                echo "<TD><center>".$note["Maths"]."</TD>";
		 echo "<TD><center>".$note["fra"]."</TD>";
		  echo "<TD><center>".$note["eps"]."</TD>";
		   echo "<TD><center>".$note["his"]."</TD>";
		    echo "<TD><center>".$note["moy"]."</TD>"; 
		     echo "</TR>";
					   
     	 }
	 echo "</TABLE>";		

<div align=center><div id ="form"><br>
<FORM ACTION="http://monserveur/recherche.php" METHOD=POST><br>
<div align=center><input type=submit action="http://monserveur/recherche.php" name="cmdAction" value="Valider"SIZE=30>
<INPUT TYPE=TEXT NAME=Numero SIZE=10><h3><b> Insérer le numéro d inscription: </h3></b>

<?php
if($res!=1)
?>

<?php
$Resultats = mysql_query("SELECT * from notes where Num='".$Numero."'");
$res = mysql_num_rows($Resultats);
?>

<?php
$Req_Compte=mysql_query("SELECT COUNT(*) AS id FROM notes WHERE num='".$Numero."'")or die("La requete de calcul ne fonctionne pas ".mysql_error());
$Data=mysql_fetch_assoc($Req_Compte);

if($Data['id']!=1)
?>