Is Rf Online Korean Free at all?And help with a client error

Hi thats the question...i made an account and thats allright but i download the client today and after update it gives me an error and i dont have ideia how to solve it :s

And when i click "OK" the game closes and i cant even log in...

here is the pic:
http://img291.imageshack.us/img291/60/semttuloda3.png

I had that same problem, I'll tell you how to fix it.

You just go to regional and language options -> advanced -> pick Korean in the selection list, restart your computer, it should work.