Connecting GameCenter leaderboard

Hi there,

I am having a little bit of a problem. I purchased this on the unity assets store.

https://www.assetstore.unity3d.com/en/#!/content/16887

I have done the setup for gamecenter fine, but now I am trying to tie in my highscores with a leaderboard on iTunes connect. I have already created my leaderboard and I have my leaderboard ID "highscorels "

I thought I could easily get it to work, what I didn't realize was that my scoring/highscore setup is written in Java and this plug in connects it through C Sharp. So they are having problems trying to talk to each other.
for the leaderboard I have tried re-writing it for Javascript but every time I think I have the code ready I get this error.

BCE0017: The best overload for the method 'UnityEngine.Social.ReportScore(long, String, function(boolean): void)' is not compatible with the argument list '(System.Type, String)'.

Code (JavaScript):

1. void ReportScore (long score, string leaderboardID) {
2.         Debug.Log ("Reporting score " + score + " on leaderboard " + leaderboardID);
3.         Social.ReportScore (score, leaderboardID, success => {
4.             Debug.Log(success ? "Reported score successfully" : "Failed to report score");
5.         });
6.     }

My code I have been using is from the unity documentation and I have been trying to work it but nothing works. Just wondering if there is an easier way or a javascript plug to get my highscore to connect to my leaderboard easier. It sucks because I am stuck on this last step, after this I am ready to upload my 2nd game!

If anyone could give me a tip or point me in the right direction that would be sweet. Thanks again