Sessions + cURL = problem

[eluser]a77icu5[/eluser]
Example
create_sess.php

Code:

session_start();
$_SESSION['my_sess'] = 'some session value';

the...you can run

Code:

http://localhost/create_sess.php

And that's great !...the session it's ok, but try doing this

Code:

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, 'http://localhost/create_sess.php');
curl_setopt($ch, CURLOPT_FAILONERROR, 1);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_TIMEOUT, 5);
$content = curl_exec($ch);
curl_close($ch);

then...we got problems, the session is not set, why ?