W3 Total Cache Error

Hello everybody

I got a problem with W3 Total Cache

I installed it and got two error messages.

1.
FTP credentials don’t allow to write to file /www/htdocs/w014e169/moneyisfreedom.ch/wp-config.php

2.
W3 Total Cache Error: Files and directories could not be automatically created to complete the installation.

Please execute commands manually Hide required changes

or use FTP form to allow W3 Total Cache make it automatically. Update via FTP

Edit file /www/htdocs/w014e169/moneyisfreedom.ch/wp-config.php and add next lines:
/** Enable W3 Total Cache */
define(‘WP_CACHE’, true); // Added by W3 Total Cache

What do i exactly have to do?

Thanks in advance

Sincerely