Entities not found in the game.. why!!

[MatthewTaylor92]

I used 3 custom entities in my custom story map, by adding them in theese two folders: (main game directory)/entities/CUSTOM, and (main game directory)/custom_stories/(cs name)/entities/(a single folder for each entity).
The problem is that my editor detect the entities, so i can use them in my maps, but when i play the map they don't appear. Possible causes? I added other static_objects but they works fine in both editor and game..