Before addressing that, you have a coding error that may mess up other things.
You open two tables for header layout, but you only close one of them, so the entire page is contained in #headerLogo.
From View Source:
HTML Code:
<!--<div id="headerBackground">-->
<table>
<tr>
<td id="headerLogo">
<!--bof-branding display-->
<table width="100%" cellpadding="0" cellspacing="0" align="center">
</td>
<td id="headerBackground">
<td align="center" bgcolor="1d5685"><img src="../../../../images/bg_header.gif" ></td>
<!--eof-branding display-->
<!--</div>-->
</td>
</tr>
</table>
<!--bof-navigation display-->
<div id="navMainWrapper">
<div id="navMain">
<div id="navExtraWrapper">
</div>
<p align="center"><img src="../../../../images/tagline.gif" /></p>
<ul>
<li><a href="http://www.fusionspiritualemporium.com//">Home</a> ::
<a href="https://secure.hostmonster.com/~fusionsp//index.php?main_page=login&zenid=24aaba0bc7693ef0e55c0c79330ff35d">Log In</a>
<!--bof-header ezpage links-->
:: <a href="http://www.fusionspiritualemporium.com//index.php?main_page=page&id=5&chapter=1&zenid=24aaba0bc7693ef0e55c0c79330ff35d">Education</a> ::
<a href="http://www.fusionspiritualemporium.com//index.php?main_page=page&id=15&zenid=24aaba0bc7693ef0e55c0c79330ff35d">EVENTS</a> ::
<a href="http://www.fusionspiritualemporium.com//index.php?main_page=privacy&zenid=24aaba0bc7693ef0e55c0c79330ff35d">Privacy Notice</a>
<!--eof-header ezpage links-->
</li>
</ul>
<!--eof-navigation display-->
</div></div>
</div><!--eof-header logo and navigation display-->
<!--bof-optional categories tabs navigation display-->
<!--eof-optional categories tabs navigation display-->
<table width="100%" border="2" cellspacing="0" cellpadding="0" id="contentMainWrapper">
<tr>
You don't need tables at all to make your layout; divs and the stylesheet will do anything you want done.