Jetpack

Boa Tarde,

Instalei recentemente o pluglin Jetpack!

Quando o tento activar aparece-me o seguinte erro:

Error Details: The Jetpack server could not communicate with your site’s XML-RPC URL. Please check to make sure http://coloniacaritas.org/xmlrpc.php is working properly. It should show ‘XML‑RPC server accepts POST requests only.’ on a line by itself when viewed in a browser and should not have any blank links or extra output anywhere.

Alguém tem alguma solução?