As an Iksar Warrior as well, I think the server may have a hard caped on AC per level.
You are capped with your raw lvl AC + item AC and buffs.
(which i got from another thread in game mechanics) If you have a higher AC it may not come into affect. I'm just guessing from what i read in this
http://www.project1999.org/forums/sh...ht=armor+class
(the chart i posted was miss leadeding it just showed raw ac cap per level)