Unity 4.1.1 Fullscreen not working on final build?

Hi there,

We have built some demo scene for our current project to show, but once we play the .exe file, if we enable the Fullscreen tick on the splash screen, our monitor flashes black and immediately returns to Desktop. However, the game is indeed running, as we can see its process in the Task Manager. Is there anything we are missing, something we must do or code in order to get this working? We are pretty sure that everything in our scripts as well as Player Settings is OK, but we don't want our final game to be played just windowed. Any ideas?

By the way, we are working with Unity 4.1.1f4, Dx11, and the Build is targeted to PC, Mac & Linux Standalone x86 - x64. Thanks!