Cannot post on my vBulletin

[SpaMMerGR]

Hello there.
Im having a huge problem on my board.
When somebody tries to post (new reply or new thread) and clicks on "Submit", an error message comes up.. The error message that is supposed to come when you post less than the minimum characters needed! [the message you entered is too short, bla bla bla...]
... When you click on Submit again, sometimes it gets accepted..

I have tried everything. Upgraded my vB from 3.8.0 to 3.8.2 , Disabled all my products (just disabled, not uninstalled - my board uses different language and i dont want to translate them again!) - i removed some products that i thought they could be the problem, nothing!

Freaky fact: I never get the message, just the other Admins and mods (The board is not published yet, so no members yet.)

Products currently installed:
Activity Modification
Advanced BBCode Permissions
Advanced Thread Bit
Better Login Form
Cyb - Attention Zero-Posters
Cyb - Check If Already Posted
Cyb - Visitors in Last X Hours
Daily PM Quota
Different Domain, Different Style
Image Resizer
MaxWCoders LinkChecker Bot
Post Thank You Hack
Separate Sticky and Normal Threads
sids hide hack
vBadvanced CMPS


Uninstalled products that had exploits:
Facebook Connect




Need help.. The board needs to be online soon, it cant be like that!