Protective Vision Plan How Do I Change The Password To My Protective Content On My Creative Zen Vision W?

How do I change the password to my protective content on my Creative Zen Vision W? - protective vision plan

When I came to my Zen, I put the password on content protection, but never used. Now I have to use it, and I forgot my password. Is it possible to change the password? All master-key to disable it? Thank you very much.