Scoreboard Update

Why this wouldn't update my scoreboard line 8

Code (Text):

    new BukkitRunnable()
    {
      public void run()
      {
          Scoreboard b = Bukkit.getScoreboardManager().getNewScoreboard();
          Objective obj = b.registerNewObjective("mainlobby", "dummy");
        Score s8 = obj.getScore(line8);
        s8.setScore(8);
        p.setScoreboard(b);
      }
    }.runTaskTimer(Core.getInstance(), 20L, 5L);
    p.setScoreboard(b);
  }
}

 

String line8 = ChatUtil.format(fm.getConfig("Scoreboard.yml").get("Scoreboard.Lines.8").replace("%player%", p.getName()).replace("%arrow%", "a->"));

 

Code (Text):

   
   
   
    new BukkitRunnable()
    {
      public void run()
      {
        Score s8 = obj.getScore(line8);
        s8.setScore(8);
        p.setScoreboard(b);
      }
    }.runTaskTimer(Core.getInstance(), 20L, 5L);
    p.setScoreboard(b);
  }
}


Like this. But this doesn't work