Jetpack wont connect to wordpress.com

Hello,

I am having this issue for some weeks now !
After activating the Jetpack plugin, I need to connect to wordpress.com.
I tried that over and over again, changed theme to the regular one provided by wordpress, deactivated all other plugins, emptied browser cache, really everting I could think of ?
I am always getting the same warning:

Jetpack could not contact WordPress.com: register_http_request_failed. This usually means something is incorrectly configured on your web host. There are no HTTP transports available which can complete the requested request.

I contacted my ISP and they that everything should go ?
In my dashboard both the WordPress url and the site url are equal !
they are set to: https://mediaphoto.be .

So, I don’t know what to do to make it work…

I also run the Jetpack Compatibility test and got this result:

TEST: HTTP Connection
Array
(
    [headers] => Array
        (
            [server] => nginx
            [date] => Mon, 10 Oct 2011 16:15:22 GMT
            [content-type] => text/plain;charset=utf-8
            [connection] => close
            [vary] => Cookie
            [x-hacker] => If you're reading this, you should visit automattic.com/jobs and apply to join the fun, mention this header.
            [x-pingback] => https://jetpack.wordpress.com/xmlrpc.php
            [expires] => Wed, 11 Jan 1984 05:00:00 GMT
            [last-modified] => Mon, 10 Oct 2011 16:15:22 GMT
            [cache-control] => no-cache, must-revalidate, max-age=60
            [pragma] => no-cache
        )

    [body] => OK
    [response] => Array
        (
            [code] => 200
            [message] => OK
        )

    [cookies] => Array
        (
        )

    [filename] =>
)

TEST: HTTPS Connection
WP_Error Object
(
    [errors] => Array
        (
            [http_failure] => Array
                (
                    [0] => There are no HTTP transports available which can complete the requested request.
                )

        )

    [error_data] => Array
        (
        )

)