[Kolbi]

You have forgot the 2 closing div?s.

Try:

<div id="ads" class="tborder content_block">
	<h4 class="thead block_title">
		<a href="#top" class="collapse_gadget" onclick="return toggle_collapse('ads')"><img id="collapseimg_ads" src="$stylevar[imgdir_button]/collapse_generic{$vbcollapse['collapseimg_ads']}.gif" alt="" border="0" /></a>
		<a name="ads"></a>
		<span class="block_name">Ads</span>
	</h4>
	<div class="block_content" id="collapseobj_ads" align="center">
	<table cellpadding="0" cellspacing="0" border="0" class="tborder" width="$stylevar[tablewidth]" align="center"> 
  <tr> 
    <td>
        <table cellpadding="$stylevar[cellpadding]" cellspacing="$stylevar[cellspacing]" border="0" width="100%">
            <tr align="center">
              <td class="alt1"><script type="text/javascript"><!--
google_ad_client = "pub-3010515223597560";
/* 200x200, created 16/09/09 */
google_ad_slot = "9446574801";
google_ad_width = 200;
google_ad_height = 200;
//-->
</script>
<script type="text/javascript"
src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
</script></td>
            </tr>
        </table>
        </div>
</div>