Creeping Death

Hello, there. I'm new at the forums. Just purchased AP a few weeks ago and I have the same problem with Peter Van der Graaf or whatever: Mina won't speak. I see that, due to the absence of a patch that fix this terrible glitch, Mr Winklebotton is helping everyone to pass the second part of the mission. Can you help me with this, please? http://www13.zippyshare.com/v/54118818/file.html Thank you. PS: Obsidian... seriously, this is an unacceptable mistake.