Windows 7 Grand Fantasia?

i have an AMD 64 athlonx2 desktop with windows 7 and i have been trying to play grand fantasia, but every time i try to log on to the servers it says " You are using a different game version. please" and it stops right there, I tried everything they said on the site, I updated my graphics card, I lowered the security, but it still doesn't fix the problem, any help would be appreciated, thank you.