if you look in vbHL file you will see clearly that the permissions are set NOT to allow any private posts to be displayed.
Code:
if ($ipermcache["$forum[forumid]"]["canview"]==1
that means, if the forum have the "canview" permissions enabled, then show the thread info.
also, the hack is designed to work with any 2.2.x version. i was wondering if you had a lower version, but that's not the case.