I've moved the rings to the four symbols and clicked the button but the door doesn't open for Wilbur, I just get the magnifying glass to look at the door and he repeats what symbols are on it. I've checked Mag's walkthrough just to make sure that the symbols are correct, but nothing. Going crazy here.

Sorry, figured it out. The star was already on the ring, so I turned it until it came up again.

Great! Have fun with the game.