Facebook, Send request in PHP, I need some explanation

I have a problem for sending a request to other friend...

I'm making a simple game, I would like to send something to other friends.... I use this script:

    $request = new FacebookRequest( $session, 'POST', '/me/apprequests', array (
    'message' => 'hey! take this',
    'data' => 'value of coin',
    'to' => $IDofmyfriend,
  )
);
$response = $request->execute();
$graphObject = $response->getGraphObject();

this will "works", but the reuquest will not send to my friends, but to me! I can read the request with my login by:

$request = new FacebookRequest(
  $session,
  'GET',
  '/me/apprequests'
);
$response = $request->execute();
$graphObject = $response->getGraphObject();

but my friend, will not see anything....

I use the test users...

maybe I'm missing something? why the request will not send? but I can see in my profile?

and how send a request to my friend? Sending request to myself doesn't make sense...

thank you very much :)