using dm to create thread reply and can't figure out how to get forumdisplay updated.

[fly]

This is the code I'm using to create a thread reply, but how do I get the forumdisplay updated?

PHP Code:

require_once('./global.php');
require_once('./includes/class_dm.php');
require_once('./includes/class_dm_threadpost.php');

$postdm = new vB_DataManager_Post($vbulletin, ERRTYPE_STANDARD);

$bythreadid = '4375';
//$byparentid = '4375'; //not sure what this is for
$byusername = 'testing';
$byuserid = '0';
//$bytitle = 'testing'; //dont want a post title
$bypagetext = 'This is a test';
$byallowsmilie = '1';
$byshowsignature = '1';
$byvisible = '1';

$postdm->do_set('threadid', $bythreadid);
$postdm->do_set('username', $byusername);
$postdm->do_set('userid', $byuserid);
$postdm->do_set('title', $bytitle);
$postdm->do_set('pagetext', $bypagetext);
$postdm->do_set('allowsmilie', $byallowsmilie);
$postdm->do_set('showsignature', $byshowsignature);
$postdm->do_set('visible', $byvisible);
$postdm->save();
unset($postdm);