How can I disable error messages or why do I get the error message though I changed right permissions to 644?

Warning: I am able to write to the configuration file: xx/xx/xx/catalog/includes/configure.php. This is a potential security risk - please set the right user permissions on this file.

Go to this file: includes/application_top.php

Then Scroll down to:

define(’WARN_CONFIG_WRITEABLE’, ‘true’);

and just change the ‘true’ to ‘false’.