why does posting to facebook page yield "user hasn't authorized the application"

I have read the fb docs and written code to publish a message to a facebook "page", however I am getting an error that I don't expect to see: ``` (#200) The user hasn't authorized the application to perform this action ``` Here's what I've done: - I set up a facebook application, which provides my `APP_ID` and `APP_SECRET`. - I set up a test facebook "page". Let us refer to its fb id as `PAGE_ID`. - Used OAuth to get a `USER_ACCESS_TOKEN` with scope "publish_actions,manage_pages" for the user. I accepted the permissions requested by my app when redirected to the facebook auth page. - I did a GET on `https://graph.facebook.com/me/accounts` using the `USER_ACCESS_TOKEN`, and I get back a list of pages I administrate, including the one I want to post to. This block of data for my page looks like: ``` { "data": [ { "category": "Community", "name": "My Generic Test Page", "access_token": PAGE_ACCESS_TOKEN, "id": PAGE_ID, "perms": [ "ADMINISTER", "EDIT_PROFILE", "CREATE_CONTENT", "MODERATE_CONTENT", "CREATE_ADS", "BASIC_ADMIN" ] }, .... ] } ``` Then I use the `PAGE_ACCESS_TOKEN` to post a message to the page: - I did a POST on `https://graph.facebook.com/PAGE_ID/feed` with a field `message` equal to `This is a test post.` Facebook returns: ``` { "error": { "message": "(#200) The user hasn't authorized the application to perform this action", "type": "OAuthException", "code": 200 } } ``` Using the token debugger, I can confirm that my `PAGE_ACCESS_TOKEN` is valid, and has scopes: `manage_pages` and `publish_actions`. Where am I missing authorizing the application? Do I need additional scopes? Did I miss clicking something on the facebook authorization screen? Is there a setting on the app I am missing? After days of debugging this, I must be blind to the problem. :-|