I recently took over an website and I am trying to log in the Zen Photo app; however, I am having trouble resetting the password. I requested the password reset via email. I received the email and followed the link to change the password. Once I was directed to the browser, I changed the password, clicked "apply." It logged me out and then requested my credentials, where I put the user name and new password into those fields.

When the above was done, it still said my log in information was incorrect. Plus it is not changing my "challenge" questions.

What am I missing?

Thanks for the help

You did not mention what Zenphoto version. Anyway, not easy to answer what the issue is from here. You can reset the password manually via the database if nothing else works (#2):
http://www.zenphoto.org/news/login-and-password-problems#forgotten-admin-password