The issue is the way the page is layed out.
the basic structure is:
<div>
<table>header</table>
<ul>Mmneu</ul>
</div>
<table>
Main Content
</table>
probably the simplest way to get this to layout correctly is going to be a master table around the two peices:
<table>
<tr>
<td>
<div>
<table>header</table>
<ul>Mmneu</ul>
</div>
</td>
</tr>
<tr>
<td>
<table>
Main Content
</table>
</td>
</tr>
</table>