I, go in Prontera with my rogue and the screen appear, i move my mouse and poof, the game is froze. I close ragnarok. I open ragnarok. I log in ragnarok. I choose my rogue. the game load. The screen stay black. I dunno if i can hear music, i didnt tried that one. well thats it, the game is just froze, and i dont get any sprite error or anything like that. sooooooooooo?
Try updating the game fully.
Downloading the new kro and stuff.
Run the auto patcher.
I don't really know the problem.