Installation Error

Hello, I am trying to install the demo version of Evolve in the domain www.clubedaschapas.com.br, and I am getting the following error mesage: PDOException: SQLSTATE[HY000] [1045] Access denied for user 'root'@'localhost' (using password: NO) in lock_may_be_available() (line 167 of /home/clubedaschapas/public_html/includes/lock.inc). Two questions: 1) Can you help me with this error? 2) What is the path in which I have to copy the database.sql.zip file into? Thank you! Paula.