未捕获OAuthException：（＃200）用户尚未授权应用程序执行此操作

I have seen many questions related to my question and also I read all answers but these answers can't solve my problem.

My problem is this I have manage_pages and publish_actions permissions but I can not post on my page as a admin. I have a vast experience in facebook api. I am using facebook page access token for uploading status as a admin

$result = $facebook->api(
    '/'.$pageid.'/feed/',
    'post',
    array('access_token' => $pagetokon, 'message' => $posts)
);

but It shows this error

"Uncaught OAuthException: (#200) The user hasn't authorized the application to perform this action"

How ever When I post on page without page access token then It successfully posted. but It posted with user name not with admin name.

As mentioned by @CBroe, as of v2.3 a new permission(publish_pages) for pages was introduced:

publish_pages Permission - This new permission is required to publish as a Page. Previously publish_actions was required. People who granted manage_pages and publish_actions before v2.3 have automatically been granted publish_pages. If anyone logs in via v2.3, you'll need to request publish_pages explicitly in addition to manage_pages.