Any component in the vkontakte group is not edited. What is the problem?

Question

PHP

Good evening. I'm trying to edit data in a group using php, without api. All the early steps were successful, but when editing a group, whether it's a description, name, settings, any data... you can't save them
. no changes occur.
Post request like this:

$post = array(
    'access'=>'0',
    'act'=>iconv('cp1251', 'utf-8', 'save'),
    'addr'=>iconv('cp1251', 'utf-8', $addr),
    'al'=>'1',
    'category_0'=>'1001',
    'category_1'=>'2015',
    'category_2'=>'3084',
    'description'=>iconv('cp1251', 'utf-8', $opisanie),
    'gid'=>$club,
    'hash'=>iconv('cp1251', 'utf-8', $hash),
    'name'=>iconv('cp1251', 'utf-8', $namegroup),
    'rss'=>'',
    'subject'=>'',
    'website'=>'',
);
$c = HTTP_POST::request("https://vk.com/groupsedit.php", $post, "https://vk.com/".$addr."?act=edit");

the output is just this: