AdSense ID script on forum

Hi,

I'm trying to put a script on a forum that would split the AdSense ads 50/50. The script is

<?php
$which_ad = rand (0, 1); // Generates random integer, 0 or 1
    if ($which_ad == 0) { // Kevin's awesome ad
?>
<script type="text/javascript"><!--
google_ad_client = "pub-XXX";
google_ad_width = 728;
google_ad_height = 90;
google_ad_format = "728x90_as";
google_ad_type = "text_image";
google_ad_channel ="3355115639";
google_color_border = "FFFFFF";
google_color_bg = "FFFFFF";
google_color_link = "215670";
google_color_text = "000000";
google_color_url = "215670";
//--></script>
<script type="text/javascript"
  src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
</script>
<?php
    }
    else { // Other person's ad
?>
<script type="text/javascript"><!--
google_ad_client = "pub-XXX";
google_ad_width = 728;
google_ad_height = 90;
google_ad_format = "728x90_as";
google_ad_type = "text_image";
google_ad_channel ="3355115639";
google_color_border = "FFFFFF";
google_color_bg = "FFFFFF";
google_color_link = "215670";
google_color_text = "000000";
google_color_url = "215670";
//--></script>
<script type="text/javascript"
  src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
</script>
<?php
    }
?> 

Code (markup):

I put <?php include('adsense_728x90.php'); ?> into the header.tpl file but it is not showing any ads.

I have used this script a few times before and it has worked fine but never on a forum. Does anyone know why this is?

Also, the forum is http://nflrivalry.com

 

how will php include work in .tpl

 

what forum software uses tpl?

I know with Vbulletin you would have to use a custom hook:fetch

 

Go to vBulletin.org.