Problems with phpadsnew

[vprp]

I have phpadsnew on my vBulletin forum. Right now, it's used to deliver Google AdSense ads. I have this in my phpincludestart.

ob_start();
include('adserverindex.php');
$adserver_index = ob_get_contents();
ob_end_clean();

So, I put $adserver_index where I want the ad to be in the template. It works on the forum home and forum display. Unfortunately, when I put it in the Postbit, it no longer works. In the postbit, I have it so ads display after the first post of each page of the thread. Could this be the problem?