Loginsystem

[qplay]

Ich bearbeite jetzt meine Loginaccount aber ich bekomme wieder einen meldugn
:(
Notice: Undefined variable: _SESSION in C:\xampp\htdocs\admin_self.php on line 11

<?php  
// Verbindung zu MySQL Aufbauen  
    @mysql_connect('localhost', 'root', '') OR die(mysql_error());  
    mysql_select_db('test') OR die(mysql_error());  
    $sql = "SELECT  
                Name,  
                Email  
            FROM  
                users  
            WHERE  
                ID = '".$_SESSION['ID']."';";  
    $result = mysql_query($sql) OR die(mysql_error());  
    $row = mysql_fetch_assoc($result);  
  
    echo "<form action=\"index.php?section=admin&amp;site=self\" method=\"post\" class=\"formular\">\n";  
    echo "    <p>\n";  
    echo "        Eigene Daten bearbeiten\n";  
    echo "    </p>\n";  
    echo "    <ol>\n";  
    echo "        <li>\n";  
    echo "            <label for=\"name\">Name</label>\n";  
    echo "            <input type=\"text\" name=\"name\" id=\"name\" value=\"".$row['Name']."\"/>\n";  
    echo "        </li>\n";  
    echo "        <li>\n";  
    echo "            <label for=\"email\">Emailadresse</label>\n";  
    echo "            <input type=\"text\" name=\"email\" id=\"email\" value=\"".$row['Email']."\"/>\n";  
    echo "        </li>\n";  
    echo "        <li>\n";  
    echo "            <input type=\"submit\" name=\"submit\" value=\"Speichern\" />\n";  
    echo "            <input type=\"reset\" name=\"submit\" value=\"Zurücksetzen\" />\n";  
    echo "            <input type=\"hidden\" name=\"".session_name()."\" value=\"".session_id()."\" />\n";  
    echo "        </li>\n";  
    echo "    </ol>\n";  
    echo "</form>\n";  
    echo "<p>\n";  
    echo "    <a href=\"index.php?section=admin&amp;'.SID.'\">Zurück</a>\n";  
    echo "</p>\n";  
?>