Forum Problems vbulletin 3.8.4 to 4.0.0
 

When I updating the version of vbulletin 3.8.4 to 4.0.0, then I accessing subforums and appear the message:

Invalid Forum specified. If you followed a valid link please notify the administrator.

However if I access the posts look good, even also run profiles of users.

I also noticed that if I use the search form and search the old posts (the posts was created before the actualization) do not appear, but the new ones I created since the update, it appear. Nor are the posts by searching for posts created by a particular user.

I know that one of the steps in the updated version appeared something about the indexes of the forum could not be upgraded (something like that did not pay much attention).

I would like you to help me solve this because I run a large forum.

Thanks