http://www.eqemu.net/patcher/mdac_typ.exe
download this if you are using win and install, reboot and use eqemu to patch it will fix the problem.....if eqemu dosent work for you at that point patch with the start menu, run, and then run the eqgame.exe in your eq dir u r using to patch from and type patchme at the end of the eqgame.exe
( example c:\programfiles\everquest\eqgame.exe patchme )
that should work if all else fails....but DO download the mdac files thats the fix for all you guys problems