IE7 Layout problem

[designv]

Hey im trying to manually put my adsense in for guests and this is whats happening to my layout. It only happens in IE7 though but works in firefox. Look at the attached img below to see what happens, it just spans all the way outside of the column for some reason. Also it only does it for js, regular text works fine. Heres the code im using:

PHP Code:

<if condition="$show['guest']">

    <!-- guest welcome message -->
    <tr>
        <td class="tcat" colspan="<if condition="$vboptions['showmoderatorcolumn']">6<else />5</if>">Our Sponsor</td>
    </tr>
    <tr>
    <td class="alt1" colspan="<if condition="$vboptions['showmoderatorcolumn']">6<else />5</if>"><script type="text/javascript"><!--
google_ad_client = "pub-6167630399546150";
/* Study Genie 728x90 */
google_ad_slot = "9845637111";
google_ad_width = 728;
google_ad_height = 90;
//-->
</script>
<script type="text/javascript"
src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
</script>
        </td>
    </tr>
    <!-- / guest welcome message -->
</if> 


Thanks for the help