Sorry for my english, I'm italian. ^^

First of all all, hi!

I'm trying to complete all daedric quest and this quest is the last...
I find the shrine, I sacrifice a companion, talk with Boethiah, I kill all followers but, then, nothing happens, Boethiah doesn't speak to me again.
My PC is 59th level and I have not already discover Knifepoint ridge because I know that this mission is bugged (so much bugged).
With my previous PC I've no problem but it was the first and so I miss one daedric mission.
I try to reload the game 5 five times.

Someone can help me?

Thanks in advice!