please check out that thread and its links... pay attnetion and try these things you will find
delete from eq directory dx8 and dx9 .dll files as well as eqmain.dll and eqgame.exe ((carefull here as this will make you live patched to regain this file and YOU MIGHT NOT WANT!!!! this for eqemu servers on 5.7dr6 ))
one quick note I can add to the suggestions you will find is that windows 2000 service pack 4 is required for the newest ATI drivers to function correctly.
also here is a driver you could try but make sure you know how to return to your old driver
http://www.asus.com/support/download...XP.zip~zaqwedc