Blockchain-API Problem

[KocaEfe]

I want use Blockchain API on my local raspberry pi host... Blockchain wallet service run normally but, when i send php request, i see this error on console:

Code:

error: Unable to establish session

and on php;

Code:

array(1) {

["error"]=> string(34) "Unexpected error, please try again" }

Please help me, how can i fix this error...

My Php;

Code:

$url = "http://127.0.0.1:3000/merchant/MY-GUID/login?password=MYPASS&api_code=MY-API-CODE";
$ch = curl_init();
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_URL, $url);
$ccc = curl_exec($ch);
$json = json_decode($ccc, true);
echo "<pre>";
var_dump($json);
echo "</pre>";

Please help me, I have v2 API Code...