mm api: SkillEvents dont work

import org.bukkit.Bukkit;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;

import net.elseland.xikage.MythicMobs.API.Bukkit.Events.*;

public class mmSkillEvents implements Listener {

    @EventHandler
    private void onMythicMobSkillEvent(MythicMobSkillEvent e) {

        Bukkit.getLogger().warning("dead event");
    }

    @EventHandler
    private void onMythicMobCustomSkill(MythicMobCustomSkillEvent e) {...