issues with new site release warning unable to write to config file

Warning Warning: I am able to write to the configuration file: /home/whiterac/public_html/includes/configure.php. This is a potential security risk - please set the right user permissions on this file (read-only, CHMOD 644 or 444 are typical). You may need to use your webhost control panel/file-manager to change the permissions effectively. Contact your webhost for assistance.

Can anyone tell me what this error is and how i can fix it?

http://whiteracingproducts.com/

You may need to use your webhost control panel/file-manager to change the permissions effectively.

Have you changed the permissions as instructed?

When i go to change the permissions, it prevents the home page from loading.

You only change the permissions on two files - includes/configure.php and admin/includes/configure.php