Failed to update your /wp-config.php file automatically

Replies: 0

Hello

I have just recently updated from Zencache lite to Comet cache lite after hosting updated their server with php 5.6.26. Comet Cache seems to be running fine when i check the page source but when saving all changes i get the normal,

Options updated successfully.

but underneath i get thumbs down,

Failed to update your /wp-config.php file automatically. Please add the following line to your /wp-config.php file (right after the opening <?php tag; on it’s own line).

define( ‘WP_CACHE’, true );

I have manually added this to /wp-config.php checked file permissions etc with filezilla, but i’m still getting the same message

Thanks
Urban Legend