sortable serialize disables sorting/dragging

sortable serialize disables sorting/dragging


with the code used below (clipped some for readability), i lose the
ability to drag and drop my list items, when i remove the 'serialize,
{key: 'order'} from the .sortable(). i regain dragging and dropping,
can anyone help me find the problem with my implementation?
    <script type="text/javascript" src="../js/jquery.js"></script>
    <script type="text/javascript" src="../js/jquery-ui-
personalized-1.5.3.js"></script>
    <script type="text/javascript">
    $(function() {
        var result = $("#gallerySort").sortable('serialize', { key:
'order'});
    });
    </script>
<ul id="gallerySort">
LOOP START
print '    <li id="positions_'.$picCounter.'
"class="sortable">LIST OBJECT</li>';
LOOP END
    </ul>