[SPOILER] Amnesia problem. Help!

[Sinister.JD]

I am stuck at this one part because of some glitch. In the Amnesia story mode at the part when you are looking for letters about how were going into some tomb and you you got stuck. When I went to the last letter I collapse and then it started reading the letter and it says something like "I saw a faint blue light" after this I can't see anything (the screen goes black) but I can hear some noise from the game. I have tried un-installing the game and reinstalling it, starting a new story and changing the quality of the graphic in game. If anyone can help me solve this problem that would be very helpful. What can I do to fix it?