If you registered before January 2008 try using your Username and the temporary Password "utente".
After you succesfully log-in you have to change the Password in the User Profile (section "Users").

If you forgot the Username you can register again, but if you published contents on SoL (articles and/or galleries), please contact the Webmaster to recover your account.

If you registered after January 2008, you can recover your password in the log-in area or create a new account if you don't remember the Username.