[jQuery] [treeview] More than three levels?

[jQuery] [treeview] More than three levels?


Hello!
Can be used more than three levels?
I'm using 4 levels, but treeview only show links to expand/colapse
nodes/uls in the first two levels.
A sample code is:
    <script type="text/javascript">
     $("#browser").treeview();
</script>
    <ul id="browser" class="filetree">
        <li><span class="folder">Folder 1</span>
            <ul>
                <li><span class="folder">Folder 1.1</span>
                    <ul id="folder21">
                        <li><span class="folder">Folder 1.1.1</span></li>
                            <ul>
                                <li><span class="file">File 1</span></li>
                            </ul>
                    </ul>
                </li>
            </ul>
        </li>
    </ul>
I see the nodes, but I can't colapse/hide the nodes.
Is this normal? the plugin can't handle more than three levels?
Thank you very much for your help, and greetings,
eemece2