Valandui

I can't turn into a vampire lord. Harkon keeps telling me to but I push the button and nothing happens other than a noise.

The game won't even let me turn into one. It won't let me access the character menu after pressing the powers button either.

I did that. It wouldn't work on her. Did it with Hroki and it worked, though.

How did you guys get her to marry you? I couldn't get it to work with the console commands.