can't open full screen mode!?

[Amazaki]

When I enter the game and go to the options bar, I am unable to change the screen from windowed mode to fullscreen.. Is there a different way to do it or?

[Momiji]

have you tried changing the game's resolution in the settings menu? Some resolutions cannot go full screen.

[Amazaki]

Well for the resolutions only 1280x800 and 1280x768 are available for me, and can't switch to full screen on either of them.. :S