el problema esta en esta parte <tr height="0">
<td><img src="images/MenuBottom.jpg" width="204" height="37"></td>
</tr>
<tr height="100%">
<td class="MenuBack"></td>
</tr>
<tr height="0">
<td><a href="index.html"><img src="images/ContactInfo.jpg" border="0" width="204" height="117"></a></td>