Recently, I have upgraded my moodel site from 1.7+ to 1.9+. The upgrade process is runing smoothly without error. I use my admin account to login moodle, it seems every is find then I ask some students to login, they no longer can login moodle, I got the message "Invalid login, please try again".
Searching all moodle forums, I can't find solution with my case.
After check with my conf & logs, I have following finding:
1. Password reset doesn't work.
2. I can successful login with those account which last access is "never". (those a/c was created long time ago before the upgrade)
3. I have tried to 1.7+ --> 1.8 --> 1.9, when I upgraded to 1.8, I have the same problem, no student can login moodle.
4. I got the error message from Apache error_log, it is ([Date] [error] [client IP] [client IP] http://domain/moodle Disabled Login: username .....)
Any ideas? Any help is greatly appreciated... and I do appreciate your response.
Thanks to everyone!!