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I made a test on activation regions and had a second one.
Now, I get a black screen on my game when I go into game mode Oo;

I put a test text in the second activation region and it still shows black..

Is there something I am missing?

Are you moving the view to the right place?

Can you define your definition of "right place?"

Depends of your game.
Look the Checkers demo:
http://game-editor.com/games/checkers.zip