Theme Coding Problem

I’ve altered the coding on a theme to insert Adsense, there was a adsense area in the theme on the RH side of site, the google skyscraper didn’t look right & needed to be right justified, I used some HTML code to do this but the whole RH side is now at bottom of site. http://www.singlesski.co.uk

Code at present is;

<table>
<tr>
<td align=”right”>
<script type=”text/javascript”><!–
google_ad_client = “pub-8234453552381294”;
/* 120×600, created 14/05/10 */
google_ad_slot = “7897357931”;
google_ad_width = 120;
google_ad_height = 600;
//–>
</script>
<script type=”text/javascript”
src=”http://pagead2.googlesyndication.com/pagead/show_ads.js”&gt;
</script>
</td>
</tr>
</table>