Sortable: tables and Firefox

Hello! I 've trying to figure how to work with tables and sortable objects. The code above works well at IE, but in Firefox i cant make it work... Does anyone know any kind od restrictions between FF and Scriptaculous?

<html> <head> <script type="text/javascript" src="../../javascript/prototype.js" /></script> <script type="text/javascript" src="../../javascript/scriptaculous.js"></script>

</head> <BODY> <table border=1 style="position:relative;" >   <tr id="linha">     <td id="0">Nome</td>     <td class="1" style='cursor: move;' id="1">Campo 1</td>     <td class="1" style='cursor: move;' id="2">Campo 2</td>     <td class="1" style='cursor: move;' id="3">Campo 3</td>     <td class="1" style='cursor: move;' id="4">Campo 4</td>   </tr>   <tr align="center" id="linha3">     <td>Nome simples</td>     <td>1</td>     <td>2</td>     <td>3</td>     <td>4</td>   </tr>   <tr align="center" id="linha4">     <td>Nome simples</td>     <td>1</td>     <td>2</td>     <td>3</td>     <td>4</td>   </tr> </table>

<script type="text/javascript"> // <![CDATA[     Sortable.create('linha',{tag:'td',dropOnEmpty:true,ghosting:true, constraint:false,only:'1'}); // ]]> </script>

</BODY> </html>