I am trying to cure my lycanthropy but I am unable to talk or interact at all with Vilkas. I have completed the companions guild and already cured Kodlak but did not cure myself at the time. I have also plenty of witch heads and have cured Farkas. I have attempted to activate the fire at the tomb but it will not activate. I want to become a vampire but can not as I have beasts blood. Anyone know how I can cure myself?