sending multiple parameters asp.net mvc jquery ajax - asp.net-mvc-3

Question

I get server error:status of 500 when I try to send 2 parameters to my action in a controller with jquery ajax, dont know why?
this is the jquery code:
$(".genreLinks").click(function () {
var genreId = $(this).attr("name");
var songId = $("#hiddenRank").val();
$.ajax({
beforeSend: function () { ShowAjaxLoader(); },
url: "/Home/AddPointAndCopyTopTenFavToPlaylist/",
type: "POST",
data: { id: songId, genre: genreId },
success: function (data) {
if (data.status === 1) {
HideAjaxLoader(), ShowMsg("Song Added Successfully")
}
else if (data.status === 4) {
HideAjaxLoader(), ShowMsg("you cannot add your own songs");
}
else if (data.status === 3) {
HideAjaxLoader(), ShowMsg("Cannot add the song. The song was most likely modified or Deleted, we advise you to refresh the page");
}
else if (data.status === 2) {
HideAjaxLoader(), ShowMsg("You cannot add the same song twice");
}
},
error: function () { HideAjaxLoader(), ShowMsg("Song could not be added, please try again") }
});
});
controller's action code that accepts two parameters from my request:
[HttpPost]
public ActionResult AddPointAndCopyTopTenFavToPlaylist(int id, int genre)
{
var song = repository.GetTopTenFav(id);
if (song != null)
{
if (!(song.UserName.ToLower() == User.Identity.Name.ToLower()))
{
foreach (var item in song.Points)
{
if (User.Identity.Name.ToLower() == item.UsernameGavePoint.ToLower())
{
return Json(new { status = 2 }, JsonRequestBehavior.AllowGet);
}
}
var newSong = new Song();
newSong.UserName = User.Identity.Name;
newSong.Title = song.Title;
newSong.YoutubeLink = song.YoutubeLink;
newSong.GenreId = genre;
newSong.Date = DateTime.Now;
repository.AddSong(newSong);
var point = new Point();
point.UsernameGotPoint = song.UserName;
point.UsernameGavePoint = User.Identity.Name;
point.Date = DateTime.Now;
point.Score = 1;
point.TopTenFavId = id;
repository.AddPoint(point);
repository.Save();
return Json(new { status = 1 }, JsonRequestBehavior.AllowGet);
}
else
{
return Json(new { status = 4 }, JsonRequestBehavior.AllowGet);
}
}
else
{
return Json(new { status = 3 }, JsonRequestBehavior.AllowGet);
}
}
I have also registered my new route:
routes.MapRoute(
"AddPoint", // Route name
"{controller}/{action}/{songId},{genreId}", // URL with parameters
new { controller = "Home", action = "", songId = UrlParameter.Optional, genreId = UrlParameter.Optional } // Parameter defaults
);