First step

Checking if config.php exists ... [OK]

Checking the database connection ... ERROR : Access denied for user 'database_usernam'@'localhost' (using password: YES)

Checking for existing database ... ERROR : Access denied for user 'nobody'@'localhost' (using password: NO)

It's crucial that you don't forget to setup the access rights with CHMOD 777 for the following:

- blacklist.txt
- censor_words.txt
- sitemap.xml
- uploads/
- uploads/avatars
- uploads/thumbs
- Smarty/templates_c

Retry