Problem with Social.ReportScore

Hi all!

Can't figure out a problem. I have registered "leaderboard01" (public string leaderboardID = "leaderboard01"; ) in itunesconnect, next code goes well:

 void Start () {
 DoLeaderboard ();
 }
 
 void DoLeaderboard () {
             m_Leaderboard = Social.Active.CreateLeaderboard();
             m_Leaderboard.id = leaderboardID; 
             m_Leaderboard.LoadScores(result => DidLoadLeaderboard(result));
         }
 void DidLoadLeaderboard (bool result) {
         Debug.Log("Received " + m_Leaderboard.scores.Length + " scores");
         foreach (IScore score in m_Leaderboard.scores) {
             Debug.Log(score);
         }

but

 void Update () {
         #if UNITY_IPHONE
         if(gameOver == true) {
             // REPORT THE PLAYER'S SCORE WHEN THE GAME IS OVER USE A GUI BUTTON TO FLIP THE BOOLEAN FROM FALSE TO TRUE SO THIS GETS CALLED
             ReportScore(highScoreInt, leaderboardID);
             gameOver = false;
         }
         #endif
         
     }
 void ReportScore (long score, string leaderboardID) {
         Debug.Log ("Reporting score " + score + " on leaderboard " + leaderboardID);
         Social.ReportScore (score, leaderboardID, success => {
             Debug.Log(success ? "Reported score to leaderboard successfully" : "Failed to report score");
         });
     }

gives an error: "Leaderboard not found." Does anybody know what can cause an error in Social.ReportScore?