Hello!
I can't continue the Beyond Death quest because Valerica does not initiate a conversation when I approach her. I've tried to use tlc, unlocked the door with the console, but I can't kill Durneviir that way. Everytime I beat him down, He gets up again with full health. I can't kill him with the console either. So I'm pretty much stuck right now. Help would be appreciated! Thanks!

i presume you haven't any mods installed - actually that's a game glitch...so have you a previous save to load and try again ???