Unable to work with library

[melnikovic]

Hey,
I'm having problem with using this library at all,

I basicly just added this at start:
include 'LinkedIn.php';

$li = new LinkedIn\LinkedIn(
array(
'api_key' => 'api_KEY',
'api_secret' => 'API_SECRETone',
'callback_url' => 'http://localhost/xampp/linkedin/'
)
);

which throw now error, but as soon as I try do something else like:
$token = $li->getAccessToken($_REQUEST['code']);

Error dispaly: Fatal error: Uncaught exception 'InvalidArgumentException' with message 'Invalid authorization code. Pass in the "code" parameter from your callback url' in

[testchik]

You needs to make two file one for display login and another for call back url. In second file needs to call $token = $li->getAccessToken($_REQUEST['code']);