Your dialogue therefore fails, any attached script fragments MAY fail, and your scenes don't play. Your quests start, but the dialogue is not properly initialized. These quests are marked as 'start game enabled'. The gist of the problem is this: You have quests with dialogue. We all refer to it as the 'dialogue bug' and it's been a pretty big thorn in everyone's sides if you're making quest mods. So I probably don't need to tell everyone that since Patch 1.6 there have been some problems with creating quests that contain dialogue.