This mod doesn't work. Hasn't worked in quite some time. If the mod author does reply, it'll simply be to tell you that it's not his responsibility to fix it, that he doesn't have the time or the inclination, and that you should be happy with the mod in its current state. In my opinion, this mod should be pulled off the database, for both of the reasons stated above.
On a more helpful note, there are currently no mods (that I know of) that correctly alter post counts. Some will prevent a user's individual post count from increasing in certain forums, but many of those mods (including this one) tend to malfunction if a post is moved to a different forum. There are no mods which correctly adjust the total forum post count -- i.e., if you have hidden forums, it's very easy to tell that there *are* hidden forums, because the post counts won't add up.