Amnesia Crashes When Launched

[viktorx1]

I bought Amnesia: The Dark Descent from Steam, and I beat it. One day after beating it, I wanted more, so I downloaded a custom map. Inside the game, i put the custom map, and when i tryed to launch Amnesia, it said there was an error. I used a steam function to "clean" Amnesia archives, and i deleted the custom map. Now, when i launch it, the option screen appears, and when i launch it, the game start running, but then it closes and a message appears:

Amnesia.exe caused an EXCEPTION_ACCESS_VIOLATION in module <UNKNOWN> at 001B:00000000

I already tryed to install the game again, but it didn't work