There are several different compilations of the server exe's floating around , not all of them have working aggro.
If you are using Drawdes worlddata1.1beta5 or the last release, the the exe's posted here will make aggro function.
http://forums.eqemu.net/viewtopic.php?t=6717 (link in reply to this post)
The DB there is a compilation of Drawdes DB with all the items, npc, and DB updates already added and matched to run with those exe's, has aggro, npc casting, and works with Drawdes new Quests0.1 files.
It's a source , add character info and go DB.