What seemed to go wrong?
In case it's not a bug, here's a list of hints for that part of the game.
But if that doesn't help, tell me right away. I'll figure out what's going on.
Okay, I think I got it. Option 3 doesn't give you any feedback if you input incorrectly. It waits for you to enter a correct input or exit with star.
Here's a list of the correct inputs that lead to new directories (but only one of them progresses the game).