Need some advice.

[DnALANGE]

Make the ambient active!
and... WHY are you using mapvieuwer anyway?
i've NEVER used it!
Just open your map trough the game { play it WINDOWED mode }
Then look for the DEBUG mode "debug mode is IF you have a script and you made a mistake the game will NOT crash, it will say what the problem\error is. } <-- MUST HAVE!!!
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SO go to MyDocuments and there is a amnesia folder, and there is a MAIN folder and in there is this : main_settings. OPEN and make this LoadDebugMenu="true" , default is false.
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So, try that and you don't really need the mapvieuwer.
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For opening the DEBUGMODE -> f1 in the game!
Good luck for more questions ask us.