Need help with ScoreBoard

I am making a kit-pvp plugin but my scoreboard isn't working correct. If a player killing an other player get everyone +1 kill here is my code:

package me.Diegokoen.Test;

import java.util.HashMap;
import java.util.List;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.OfflinePlayer;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.entity.EntityDeathEvent;
import org.bukkit.event.player.PlayerJoinEvent;
import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.scoreboard.DisplaySlot;
import org.bukkit.scoreboard.Objective;
import org.bukkit.scoreboard.Score;
import org.bukkit.scoreboard.Scoreboard;

public class main extends JavaPlugin implements Listener {

private Scoreboard board;
private Objective o;
private HashMap<OfflinePlayer, Score> scores = new HashMap<OfflinePlayer, Score>();

public void onEnable() {
Bukkit.getServer().getPluginManager().registerEvents(this, this);

board = Bukkit.getServer().getScoreboardManager().getNewScoreboard();

o = board.registerNewObjective("test", "dummy");
o.setDisplayName("§cKills");
o.setDisplaySlot(DisplaySlot.SIDEBAR);

saveDefaultConfig();

List<String> s = getConfig().getStringList("scores");

for (String str : s) {
String[] words = str.split(":");
scores.put(Bukkit.getServer().getOfflinePlayer(words[0]), o.getScore(Bukkit.getServer().getOfflinePlayer(ChatColor.GREEN + "Kills")));
scores.get(Bukkit.getServer().getOfflinePlayer(words[0])).setScore(Integer.parseInt(words[1]));
}
}

public void onDisable() {
List<String> s = getConfig().getStringList("scores");

for (OfflinePlayer p : scores.keySet()) {
s.add(p.getName() + ":" + scores.get(p).getScore());
}

getConfig().set("scores", s);
saveConfig();
}

@EventHandler
public void onPlayerJoin(PlayerJoinEvent e) {
Player p = e.getPlayer();

p.setScoreboard(board);

if (scores.get(p) == null) scores.put(p, o.getScore(Bukkit.getServer().getOfflinePlayer(ChatColor.GREEN + "Kills")));
}


@EventHandler
public void onEntityDeath(EntityDeathEvent e) {
if (e.getEntity() instanceof Player) {

Player killer = e.getEntity().getKiller();

scores.get(killer).setScore(scores.get(killer).getScore() + 1);
}
}
}
ps: I don't have errors

 

Bump

 

Diegokoen
Next time, please put your code in actual syntax.
It's easier to read.