Leader Board score for all players issue......

Hello,

After long surfing i can not find the event/function that i should call for getting the score of other users.0
Please let me know if there any event is there in game center plugin and what is that event, so that i can go and check with the same.

my code is here:

Code (csharp):

1.  
2. ====================================
3. if(Button Click)
4. {
5.     if(!GameCenterBinding.isPlayerAuthenticated())
6.         AuthenticateGameCenterUser();
7.     else
8.     {
9.            GameCenterBinding.reportScore (PlayerPrefs.GetInt("_kHighScore"),"LeaderBoard_ID");
10.         GameCenterManager.categoriesLoaded += HandleGameCenterManagercategoriesLoaded;
11.         GameCenterManager.reportScoreFinished += HandleGameCenterManagerreportScoreFinished;
12.         GameCenterManager.reportScoreFailed += HandleGameCenterManagerreportScoreFailed;
13.         buttonclick = true;
14.     }
15. }
16. if(buttonClick)
17. {
18.        GameCenterBinding.loadLeaderboardTitles();
19.     GameCenterBinding.reportScore ( PlayerPrefs.GetInt("_kHighScore"), "LeaderBoard Id");
20.     GameCenterBinding.showLeaderboardWithTimeScope (GameCenterLeaderboardTimeScope.AllTime );
21. }
22.  
23. void HandleGameCenterManagerreportScoreFailed (string obj)
24. {
25.     Debug.Log("bye = " + obj);
26.     GameCenterBinding.reportScore(PlayerPrefs.GetInt("_kHighScore") , "iTS_LeaderBoard");//LeaderBoard Id
27.     isHighScoreClicked = false;
28. }
29.  
30. void HandleGameCenterManagerreportScoreFinished (string obj)
31. {
32.     Debug.Log("Hello = " + obj);
33.     isHighScoreClicked = false;
34. }
35.  
36. void HandleGameCenterManagercategoriesLoaded (System.Collections.Generic.List<GameCenterLeaderboard> obj)
37. {
38.     isHighScoreClicked = false;
39. }
40. ====================================
41.  

please let me know if i am doing any thing wrong in my code...???

thanks
Niki.j