You're missing a tr tag a closing tr and a closing table tag. In addition, you don't need the div tags.
This code is correct and working here:
HTML Code:
<table align="center">
<tr>
<td valign="top">
<table border="0" cellpadding="0" cellspacing="0" align="center">
<tr>
<td>
<img border="0" src="http://www.iguanacenter.com/images/blockimg/aeditsideleft.jpg" width="20" height="35"></td>
<td background="http://www.iguanacenter.com/images/blockimg/aeditsidemiddle.jpg"></td>
<td>
<img border="0" src="http://www.iguanacenter.com/images/blockimg/aeditsideright.jpg" width="20" height="35"></td>
</tr>
<tr>
<td background="http://www.iguanacenter.com/images/blockimg/asideleft.jpg"></td>
<td>
<!--Start Text Here-->
sad
ssssssssasdasd
<!-- /End Text Here-->
</td>
<td background="http://www.iguanacenter.com/images/blockimg/asideright.jpg"></td>
</tr>
<tr>
<td>
<img border="0" src="http://www.iguanacenter.com/images/blockimg/aeditsideleftbottom.jpg" width="20" height="35"></td>
<td background="http://www.iguanacenter.com/images/blockimg/aeditsidemiddlebottom.jpg"></td>
<td>
<img border="0" src="http://www.iguanacenter.com/images/blockimg/aeditsiderightbottom.jpg" width="20" height="35"></td>
</tr>
</table>
<br /><br />
</td>
</tr>
</table>