UBB.Developers Forums UBB.threads 7 Development How Do I? hidden forums

I've created a hidden forum for my moderators. Hidden meaning changing the R/W access to Admins & moderators only (all the rest no access).

However, in the list of last posts(dosearch.php), the posts in that forum do show up (if they click in the url, the receive no access message)..

I want to have this forum completly hidden, also the posts in it in search queries.

UBB Threads 6.2.3