Unknown column 'userpass' in 'field list'

Question

I'm working on the following project: http://lpmj.net/20.php

I've made several entries into phpMyadmin and am getting used to making the mySQL and php correspond, but with this error i have no idea what the code is asking for.

This is the error i'm recieving:

Unknown column 'userpass' in 'field list'

Any help what this is indicating would be appreciated.