Not saved settings control (Grand Theft Auto 4)

Hello, sorry if not there I write, some days I will not persist the settings (exactly) control. I changed to your taste settings control the keyboard, after you exit the game everything is reset, as was originally installed settings control the keyboard and after you exit the game become. Although I after changing your settings, remained, the same and in different houses, and nothing helps. The rest of the settings are saved, the graphics, the gameplay, the cheats remain on the phone, etc. on the Internet queries found nothing. System Windows 8.1 x64. Thanks in advance.