vBCMS Problem with editing a Section

[HM666]

I'm getting this error every time I try to edit a CMS section on a client's site. Please read my entire post, I have tried pretty much everything that is already listed on the site here, so please do not assume my situation is just like the others listed. I have already followed everything that I can in THIS thread.

Your submission could not be processed because a security token was missing.

If this occurred unexpectedly, please inform the administrator and describe the action you performed before you received this error.

The Problem:

When I go to edit a section in the CMS I get the above error message. This seems to only happen in a section and not when I try and edit an article. I cannot change things by clicking the little edit pencil in the CMS, but I can change things in the admincp like published, not published etc of the sections. All the permissions are set on the sections so I should be able to edit them within the CMS.

Also this site's forum/cms is in a subdomain. I'm not sure if that will make a difference or not. We are going to be moving it into the main domain once this issue is resolved.

vBulletin & Server Info:

vBulletin Suite 4.2.2 P2
MySQL 5.5.40-cll
PHP 5.4.29
Apache 2.2.27
Perl 5.10.1

There are only 6 hacks installed on the site, if you need a list for what ever reason please let me know.

Things I Have Already Done (in Some Cases More Than Once):

1. Upgraded to the latest version of vBulletin 4.2.2 P2
2. Re-uploaded files overwriting the upgraded files (did this 3 times)
3. Checked files for suspect file versions (Deleted all old vB files, but kept the hacks that are installed)
4. Cleared browser cache 3 times.
5. Checked the site in Firefox, Chrome & IE got the same result in all of them.
6. Created a new skin and tried to make the edits in the new skin after clearing the cache, did not work.
7. Disabled all plugins except the CMS and checked in all 3 browsers after clearing the cache
8. Flushed my Windows 7 DNS cache on my Laptop
9. All add-ons are up to date as I just installed them about 2 weeks ago.

Please help me get this resolved. Thanks.