IXR -32300: transport error: http_request_failed Operation timed out after 2001

I’m having problems with my Jetpack installation. Can you help me resolve it?

– It’s a new installation on a subdomain
– DNS refreshed 24 hours ago
– When I create another subdomain and instal Jetpack, it works.
– XMLRPC says: “XML-RPC server accepts POST requests only.”
– Jetpack works on all the other domains that I have

DEBUG:

It looks like your site can not communicate properly with Jetpack.
SELF:
Array
(
[headers] => Array
(
[server] => nginx
[date] => Tue, 19 Aug 2014 08:15:17 GMT
[content-type] => text/plain;charset=utf-8
[connection] => close
[x-pingback] => http://jetpack.wordpress.com/xmlrpc.php
[expires] => Wed, 11 Jan 1984 05:00:00 GMT
[cache-control] => no-cache, must-revalidate, max-age=60
[pragma] => no-cache
[x-hacker] => Jetpack Test
)

[body] => {“error”:”Communication error”,”error_description”:”We were unable to make an XML-RPC request to your website. Please make sure that XML-RPC is turned on and that Jetpack is installed, activated and connected with your WordPress.com account.”}
[response] => Array
(
[code] => 400
[message] => Bad Request
)

[cookies] => Array
(
)

[filename] =>
)

https://wordpress.org/plugins/jetpack/