This is not the place on the forum to ask questions.
But yes v12 flyff of gpotato is good. Now delete flyff.a Go to flyforhero.net click downloads and download our patcher. Extract it with winrar and place the patcher in your flyff folder. Open a file called "neuz.ini" (with notepad). Leave the IP there as "" (no numbers between the "'s) Now run the patcher and let it update, now you can play. btw, make sure you don't use any capital letter in your account ID.
MY FLY FOR HERO IS A PATCH OF V12 FLYFF GPOTATO CAN U TELL ME IF ITS OK? 
