1º Get the manual patch here http://flyff-media.gpotato.com/20061102updat.zip
2º Extract the Files to Your Gpotato Folder>flyff
3º he will ask if you want to overwrite you click "yes to all"
4º start up your launcher and it will download and decompress 236 files
5º it will stop every now and then you just have to press ok and instead of cancel click try again..
6º now when the patcher says START, close it and open again, let it patch
7º Start and begin to play
J'ai trouvé cette solution en cherchant sur le net ton code d'erreur. 