Cannot login to phpBB with correct password?

Auto-Install Applications > PHPBB
Getting this error:
"You have specified an incorrect password. Please check your password and try again. If you continue to have problems please contact the Board Administrator"
1. make sure the password is correct. Else, try to use phpmyadmin to reset it.
2. try manually deleting everything from your /cache folder EXCEPT index.htm using FTP.