When I was really little I saw a matinée movie (live action) about a forest world populate by little mice and rabbits that is taken over by a tyrannical chimpanzee. After some adventures all is restored to order. What was the name of this film?

The Secret of Magic Island (http://www.youtube.com/watch?v=uFZ2X6hrk6o)?

Thank you. Actually, that trailer didn't look like how I remember it, but maybe that's it.