After doing an upgrade last week to the newest version of DNN, I realized that none of my Members' usernames and passwords are working anymore.  I know they're still there because I go to "Users" and they're all still listed, they just no longer are accessible.  I had to reset my Super User account in the database just to be able to login to the site. 

Has this ever happened to anyone else, and if so, how did you fix the problem?  I think that I may have lost one of the .dll files in the transition or something.

Any thoughts would be greatly appreciated.

Thank you Chris.  Unfortunately, I did this step already and it didn't help.  I think there's something wrong with the "Forgot Password" prompt when logging in.  It shows this error:  Retrieve Password:  There was an error retrieving your password. No password was sent. 

But it will allow me to login as the Super User and reset passwords there.  I'm just afraid that people will try to login and their password won't work and when they try to click "Forgot Password" they'll receive the error message.

Thanks again,
Liz Wendel.