When this happens, help them out and direct them to a thread with the answer.
also, this happened to me too on the PC, where you don't get clues(I know they lie due to the book and mindread) or answers or anything from the statues, it just says "continue."
What I did is just found the answers online and told the door and it opened even though the statues did not work(you can still tell them their name, they just don't respond, but apparently the game still registers it as you telling the statues their name).
That being said the answers to the statues is here http://www.gamefaqs.com/computer/doswin/file/952260/58701
Only part of the game where I needed help, it kinda pissed me off that I couldn't do it on my own due to a bug.