Remote API Permissions - API Error 10003 - no permissions

I use aMember Pro ver4 and cms wordpress.
Active api Remote API Permissions, check all option (see attached image)
When i write a function check user login:
http://example.com/amember/api/check-access/by-login-pass?_key=APIKEY&login=john&pass=1234
aMember service result:

["message"]=> "API Error 10003 - no permissions for check-access-post API call"

PHP:

<?php
$url = 'http://YOURDOMAIN.COM/amember/
api/check-access/by-login-pass
';.
 
$fields = array(
            '_key' => 'my_SECRETKEY',
            '_format' => 'xml',
            'login' => 'username01',
            'pass' => '111111111'
    );
 
 
$fields_string  = http_build_query($fields);
//open connection
$ch = curl_init();
 
//set the url, number of POST vars, POST data
curl_setopt($ch,CURLOPT_URL,$url);
curl_setopt($ch,CURLOPT_POST,count($fields));
curl_setopt($ch,CURLOPT_POSTFIELDS,$fields_string);
 
//execute post
$result = curl_exec($ch);
 
//close connection
curl_close($ch);

Please, help me!
Thanks!