Ad block on template bit messed up

Hmm, this is strange.
I've added an ad block on my other site that i'm working on but it behind the tables.
Check here to see how it should look like on all pages:
http://www.streetcars.nl/index.php
And here how it gets behind the table:
http://www.streetcars.nl

Any idea how this can happen?
I've added this code in the template file (most of the code was already there):

<table width="100%" border="0" cellspacing="0" cellpadding="10">
</table>
<tr> 
  <td class="bodyline" bordercolor="345487"><br>
	<table align="RIGHT" border="0" width="200" cellspacing="1" cellpadding="0" bgcolor="345487">

	  <tr> 
		<td height="29" valign="MIDDLE" bgcolor="EEF2F7"><div align="center">
<script type="text/javascript"><!--
google_ad_client = "XXXXXXXXXXXXXXX";
google_ad_width = 234;
google_ad_height = 60;
google_ad_format = "234x60_as";
google_ad_type = "text";
google_ad_channel ="";
google_color_border = "EEF2F7";
google_color_bg = "EEF2F7";
google_color_link = "0000CC";
google_color_url = "008000";
google_color_text = "000000";
//--></script>
<script type="text/javascript"
  src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
</script>
</div></td>
	  </tr>
	</table>
	<br>
	<div align="right"> 
	  <p><br>
	  </p>
	  </div>

HTML:

 

1. try moving the AdSense script outside the table - if necessary, close the table above it, insert the script, then open a new table for what follows it

2. I assume this is in overall_header.tpl? if not, it should be

 

Thx Minstrel, i'll try it out
Yep, it's in overall_header.tpl