I made a posting scores. It worked normaly sometimes. But, now I cant post any score.

If I use user accessToken:

string path = meID + "/scores"; 
var parameters = new Dictionary<string, object> (){ 
    { "score", score.ToString () },
    { "access_token", accessToken } 
};
facebook.post (path, parameters, ( error, obj ) =>

I get error:

{"error":{"message":"(#15) This method must be called with an app access_token.", 

"type":"OAuthException", "code":15}}

If I use an app access token:

string path = meID + "/scores";
var parameters = new Dictionary<string, object> () {
    { "score", score.ToString () },
    { "access_token", appAccessToken }
};

facebook.post (path, parameters, ( error, obj ) =>

I get other error:

{"error":{"message":"A user access token is required to request this resource.", 

"type":"OAuthException", "code":102}}

Help me please, what am i doing wrong?

PS: I worked well recently, but now - dont. Cant explain it...