The Dink Network

I have already completed several tasks. Found the wizard, bought new clothing for the girl and gave her, got rid of low quality art, saw the scene with the evil wizard, found the Fairy and released her at the screen with the waterfall. I followed the fairy and she disappeared a screen left from the entrance of the mountain trail. But I cannot see what is the clue. I talked to everyone several times. But I cannot get another clue. The road where trolls work is still closed. So I am stuck.