Custom mobs disappearing after server restart

How the title says I have that problem, when I restart my server all mobs in it stays but custom mobs.

Why I having this problem?, it's possible to get the mobs stay where they where before restart after it?.

Thanks for any help!

 

custom mobs? explain a little more please.....

 

When I say custom mobs I mean mobs that I made extending an existing mob class. For example a mob extending the EntityZombie class.
I add that mobs with:

Code:

MyZombie myzombie = new MyZombie(mcWorld, location);
mcWorld.addEntity(myzombie, SpawnReason.CUSTOM);

I saw that way to add customs from here and it functions well, my mobs spawns, the problem is that when I restart the server that mobs disappears, when I really need them to stay after restarting.

 

did you figure it out?

 

Save location and type, and spawn a new one onEnable()?

 

that would be horrible. had to store every mob, save list to file, load on start and place new mobs.

 

You would only have to store its location and classname. Still would be kind of horrible though, but I don't know any better methods by just using the Bukkit API

 

Unless you have instances of the normal mob and the new mob, just have every mob spawned (of the type, in your case Zombie) replaced by your custom version. Have your plugin load up BEFORE the world is loaded and then every mob that is created as the world is loaded should be replaced.