FB.AppRequest is doing nothing

I have integrated Facebook SDK in my game, logging in and sharing works fine but when I try to send app request it shows my friends list and allows to send a message also but the person on other end doesn't get anything. No messages, no notification, no nothing. I am completely lost here trying to work things out. Any help is greatly appreciated.


here is my code for app request

Code (CSharp):

1.  
2. public void Invite()
3.     {
4.         if (FB.IsLoggedIn)
5.         {
6.             FB.AppRequest(
7.             "I Just got " + game.GetScore().ToString() + " points! Can you beat it?",
8.             null, null, null, null, null, null,
9.             delegate (IAppRequestResult result) {
10.                 Debug.Log(result.RawResult);
11.             }
12.         );
13.         }
14.     }

The code works till here (Screenshot added below). But when I click send, it doesn't send anything to anyone.

 

It's been a while since I've done any Facebook stuff, but I do remember that a lot of the api calls will only work with test users until your app has passed the Facebook approval process.