How to check liked fan page from iframe apps via Graph API and Javascript-SDK

Here is my code开发者_C百科, this is working fine only on apps developer account. WT is my wrong?

window.fbAsyncInit = function() {
var APP_ID   = 'XXXXX';
var PAGE_ID  = 'XXXXX';

FB.init({
    appId  : APP_ID,
    status : true, // check login status
    cookie : true, // enable cookies to allow the server to access the session
    xfbml  : true,  // parse XFBML
});

FB.api('/me/likes/' + PAGE_ID, function(response) {
    t = $.toJSON(response);
    alert(t);
}); 

}

RESULT

developer account:

{"data":[{"name":"111222333","category":"Small business","id":"281428705206834","created_time":"2011-09-02T14:14:37+0000"}]}

non-developer account:

{"error":{"type":"OAuthException","message":"An active access token must be used to query information about the current user."}}

It might have something to do with the page settings. If the page is set to be invisible, as in only visible for the administrators of that page, that could be a cause why you are getting that error.

Have you set your page available for everyone?

In order to see a user likes with graph api you will need the permissions to do so. user_likes

See: http://developers.facebook.com/docs/reference/api/permissions/