I've led the boy through what I think are all his trials, but he's crying at this door now. There's a song printed above him, but no matter how many times I play it, nothing happens. I've tried playing it backwards too, but that doesn't seem to help. Besides, the background music sort of sounds like the song I'm supposed to play anyway, so I'm sure it's the right song. Just... nothing is happening. Playing it while a the door? Nothing. Kneeling by the child? Nothing. At the notes themselves? Nothing.