Post installation

All,

I am using the forum module and am attempting to create both general discussion areas as well as restricted areas for only certain users to be able to post to and access. Here is the setup:

Announcements (forum)
Deparmental Discussions (container)
-- Dept. 1 (forum)
-- Dept. 2 (forum)
-- Dept. 3 (forum)
Product Discussions (container)
-- Product 1 (forum)
-- Product 2 (forum)
Miscellaneous Chit-Chat

The areas I would like to restrict are:
-- Dept. 1 (forum)
-- Dept. 2 (forum)
-- Dept. 3 (forum)

I am using Tac_Lite on my site.

So far, there are only two user roles on my site, anonymous and authenticated user. All users are authenticated users; there is no anonymous access.

What I wanted to be able to do was use the forum "vocabulary" (really, just the same as its hierarchy/section titles) to assign and restrict access, so that each individual user would be assigned to all general fora and, additionally, the departmental forum to which he or she belongs.

First, I disabled access to the forums for authenticated users, and planned to add it back in the following way:

I went into administer > user > tac_lite settings (I already had enabled the forum vocabulary for tac_lite) and selected the fora. I was able to do that, but the problem is that the user is now able to access/view/post to ALL the departments (if I enable the Departmental Discussion container), or NONE of the departments, including the one I selected, if I DESELECT the Departmental Discussion container BUT ENABLE a forum inside it.

Fatal error: Duplicate entry '5be0221bafe79ecf83e4fe32892b8eb0' for key 1 query: INSERT INTO sessions (sid, uid, hostname, timestamp) VALUES ('5be0221bafe79ecf83e4fe32892b8eb0', 0, '143.252.80.100', 1167841787) in /home/bulmanp/public_html/Drupal/includes/database.mysql.inc on line 66

Help!

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