heres what i did to make it work i found this on arcemu.com
C/P
Updating the revision
In most of the wow patche's they do nothing with the server core, so we can update our server easily without downloading anything, just follow my easy step's and you will be done in 1,2,3.
First we need to locate our logon config file, this is located in your server main folder/configs open it and find:
QUOTE
<Client MinBuild = "9100"
MaxBuild = "9551">
Min build : defines that the client need 9100 or higher
Max build : defines that the client can't have a greater build then 9551
Now only change the maxbuild to the current revision. This could easily be found when opening your wow client, look down in the left corner and you will see something like this: Version 3.0.9 (9551)(Release)
Version is the current patch and 9551 is the revision. When updating to the latest build just put 9551 or whatever that stands there into MaxBuild.
Some usefull builds:
QUOTE
Wotlk 3.0.8a : 9506
Wotlk 3.0.9 : 9551
that was easy...... hopes this helps who ever needs it