If you have not been online for a few weeks or longer and could not log in to your existing account, please read the following:
We have upgraded the forum and course system recently. Now everything works very well again, even with several improvements, and faster than before Unfortunately password handling has changed and could not be migrated.
This means that you will need to reset your password. You can use the "Forgot my password" link on the login page. That will immediately send an email to your registered address with a link that allows you to set a new password (feel free to use the old one again).