Question / Help Monitor Capture Won't Work

[HN3107]

Hi! I have a problem with OBS: OBS won't record my monitor. The OBS window just turns black and nothing happens. This started to happen some days ago. Does anyone know a solution to this problem?

Here is a picture of the problem: http://tinypic.com/view.php?pic=2ahic5t&s=8#.VKVY7CuG-FU

Here is the log: http://pastebin.com/bC1h8pfK

And if it helps I have a Windows 8 machine.

Thanks for the help!

EDIT: OBS works with Game Capture.