There are two ways to fix this.
1) I`ve send you a PM with corrected CD Key you can use.
2) the following steps:
-Download this file http://dofgame.com/updater/bin/Updat...aterUpdate.exe
-copy that file into your dawn of fantasy directory (typically C:\Program Files\Reverie World Studios\Dawn of Fantasy\)
-Run the file, and everything should work correctly from there