[CBNeter]

maybe this code you can use, because I use on my forum and can work well.

bellow :

<blockquote class="postcontent restore ">
{vb:raw post.message}
</blockquote>
</div>

add this code :

<vb:if condition="$post[postcount] % $vboptions[maxposts] == 1">
<script type="text/javascript"><!--
google_ad_client = "pub-XXXXXXXXXX";
/* forum */
google_ad_slot = "0149128395";
google_ad_width = 665;
google_ad_height = 90;
//-->
</script>
<script type="text/javascript"
src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
</script>

Demo Forum