it Because the emu sever your trying to connect to is made for a different patch version than what your wow client is so you need to update your client to the version your sever is running. or DE-patch
IF your running the sever this is why
how to find out what your patch number is
1.open your wow cilent
2. in the lower left corner it should say something like
"Version 3.3.2 (11403) (release)"
the "3.3.2" bit is the version of your client
3.if you cant find the version of your sever open the logon/logon.conf in a text program. there should be a part of it that looks like this:
Code:
/* Accepted Build Range Setup
*
* These two directives set up which clients will be
* allowed to authenticate with the realm list.
*
* Set these to the same builds that the server was
* compiled for.
*
* As of the last update, version 3.1.3 was build 9947.
*/
<Client MinBuild = "10958"
MaxBuild = "11159">
the "MinBuild = "10958"" is the lowest build the sever will allow to connect
now back on your cilent the number after your version is the build
Version 3.3.2 (11403) (release)
if it's above or blow the value in the config file it will give you that error.
to fix it
Ether update (or DE-patch) your client or change the max/min build in the config