Nested sortables... again :(

Nested sortables... again :(


I've not found any solution @ this... could someone help me?
I need to reorder a system menu. This is my code but I can't
dropOnEmptyZone... where is my fault?
Really thanks to all :D
<html xmlns="http://www.w3.org/1999/xhtml">
    <head>
     <script type="text/javascript" src="jquery-1.2.6.js"></script>
     <script type="text/javascript" src="ui/jquery.ui.all.js">
        </script>
        <script>
        $(document).ready(function(){
            $("ul#topmenu_edit").sortable({
                connectWith: ["ul"],
                items : "li" ,
                dropOnEmpty:true
            });
        });
     </script>
    </head>
    <body>
     <ul id="topmenu_edit">
     <li id="topmenu_aggiorna">
     <img title="sposta" src="move_16.png" class="move">Ricarica</
li>
     <li id="topmenu_index">
     <img title="sposta" src="move_16.png" class="move">Home</li>
     <li style="" id="topmenu_users">
     <img title="sposta" src="move_16.png" class="move">Utenti
     <ul id="UL_9">
     <li id="topmenu_elenco_utenti">
     <img title="sposta" src="move_16.png" class="move">Elenco</
li>
     <li id="topmenu_nuovo_utente">
     <img title="sposta" src="move_16.png" class="move">Nuovo</
li>
     </ul></li><li style="" id="topmenu_permessi">
     <img title="sposta" src="move_16.png" class="move">Permessi
     <ul id="UL_44">
     <li id="topmenu_permesso.elenco">
     <img title="sposta" src="move_16.png" class="move">Elenco</
li>
     <li id="topmenu_permesso.nuovo">
     <img title="sposta" src="move_16.png" class="move">Nuovo</
li>
     </ul></li>
     <li id="topmenu_prenotazione.elenco">
     <img title="sposta" src="move_16.png" class="move">Elenco</li>
     <li id="topmenu_logout">
     <img title="sposta" src="move_16.png" class="move">Logout</li>
     </ul>
    </body>
</html>