couple things you should know soes, every patch that you download eqgame.exe you WILL get the Incorrect Client Version until you get the updated version of MQ. I could attempt to explain to you why, but i'm not positive. what you can do to determine if theres a new one out is go to the Redquest thread and look at the post date. compare that to the patch date and you should be able to figure out if it will work or not. if it still wont work then you should post some other details (If your trying to run EQEMU or have -patchme on to disable patch)
also i think you posted in the wrong area. as you asked a question it should have went in the help questions and requests forum. if you click home->everquest1-> and below the EverQuest Strategies and Cheats forum link theres links to two sub forums "General Discusion -open to only subscribers and the Question,Request,help forum.