Demons Souls starts but theres a graphical bug

Well, thanks! But its not working, I suppose; at least not in the menus, because in the character creation the same problem persists, and a new one has appeared: because when the loading to enter in the game world finishes, the game freezes, the FPS freezes, everything just become ice. I'm not worried, anyways. Maybe later I'll be able to run this properly!