NPC not spawning

So I made my own npc spawning stuff just to get rid of some dependencies. I encountered a problem with spawning/despawning/respawning the npc's.
does anyone know how to correctly spawn it?
the class extends EntityPlayer

Code:

@Override
    public void spawn(Location location, NPCSpawnReason reason, NPCEntity npc) {
        World world = location.getWorld();
        sendPacketsTo(Bukkit.getOnlinePlayers(), new PacketPlayOutPlayerInfo(
                EnumPlayerInfoAction.ADD_PLAYER, npc));
        WorldServer worldServer = ((CraftWorld) world).getHandle();
        setPositionRotation(location.getX(), location.getY(), location.getZ(),
                location.getYaw(), location.getPitch());

        worldServer.addEntity(npc, SpawnReason.CUSTOM);

        this.spawned = true;
        Bukkit.getPluginManager().callEvent(
                new NPCSpawnEvent(npc, location, reason));
        plugin.questers.resetHear(getUniqueId());
    }

    @Override
    public void despawn(NPCSpawnReason reason) {
        this.spawned = false;
        plugin.questers.canceltasks(getUniqueId());
        sendPacketsTo(Bukkit.getOnlinePlayers(), new PacketPlayOutPlayerInfo(
                EnumPlayerInfoAction.REMOVE_PLAYER, this));
        if (reason == NPCSpawnReason.DESPAWN) {
            Bukkit.getPluginManager().callEvent(new NPCDespawnEvent(this));
        }
        this.getWorld().removeEntity(this);
    }
    @Override
    public void respawn() {
        Location respawnloc = getCurrentloc();
        this.spawned = false;
        NPCEntity npc = this;
        despawn(NPCSpawnReason.RESPAWN);
        spawn(respawnloc, NPCSpawnReason.RESPAWN, npc);
    }

and the packet send methods if you are interested.

Code:

    private void sendPacketsTo(Iterable<? extends Player> recipients,
            Packet... packets) {
        Iterable<EntityPlayer> nmsRecipients = Iterables.transform(recipients,
                new Function<Player, EntityPlayer>() {
                    public EntityPlayer apply(Player input) {
                        return (EntityPlayer) getHandle(input);
                    }
                });
        for (EntityPlayer recipient : nmsRecipients) {
            sendPacketsTo(recipient, packets);
        }
    }
  
    private void sendPacketsTo(EntityPlayer player, Packet... packets) {
        if (player != null) {
            for (Packet p : packets) {
                if (p == null) {
                    continue;

                }
                player.playerConnection.sendPacket(p);
            }
        }
    }