My guess is that you actually did not solve the trap, as in you keep failing the Punishment Mini-Game which results in Yui getting Wraptured which is a Game Over and your just Loading a Checkpoint which is set before you pressed the Button and Open the Door.
During the Punishment Mini-Game by default you should see the input [A] or [D] on the left or right side of the screen. Press that correct input when it appears. Do it correctly enough times and you should see You've Endured The Punishment and you be able to continue.
If this is not the issue, then my only other guess is you have a corrupted game file and need to redownload the file.