rgingrich:

To release the Princess you need to stand on the buttons on the floor to release the force field. If you are playing with two players you need to stand on the buttons at the same time, if your playing a single player game you need to stand on the button until the cpu player stands on the other button. Once you do this it will cut to a movie and the level is done.

Robhffk:

Like Lyndon said if you could give us some more details we could definitely help you out.