I have no idea. I can't even remember how long it was before I was able to continue, although I remember that it did or I probably would never have finished the game (unless I had asked my son to help me with it).
I found
this page which shows the solution, although I am sure you have looked at plenty of similar things already. And there is a video
here on YouTube.
The worst puzzle for me was the balcony door lock puzzle in Shadow at the Water's Edge.