Ore Generator registration problem.

[gash]

Guten tag!

So, I have this generator code:

package com.gashk.amethyst.generation;

import java.util.Random;

import com.gashk.amethyst.init.Amethyst;

import net.minecraft.util.BlockPos;
import net.minecraft.world.World;
import net.minecraft.world.chunk.IChunkProvider;
import net.minecraft.world.gen.feature.WorldGenMinable;
import net.minecraft.world.gen.feature.WorldGenerator;
import net.minecraftforge.fml.common.IWorldGenerator;

public class AMGen implements IWorldGenerator {	
@Override
public void generate(Random random, int chunkX, int chunkZ, World world, IChunkProvider chunkGenerator, IChunkProvider chunkProvider)
{
    switch(world.provider.getDimensionId())
    {
    case 0:
    generateSurface(world, random, chunkX*16, chunkZ*16);
    break;
    }
}

public void generateSurface(World world, Random rand, int chunkX, int chunkZ)
{
    for (int i = 0; i < 25; i++)
    {
        int randPosX = chunkX + rand.nextInt(16);
        int randPosY = rand.nextInt(100);
        int randPosZ = chunkZ + rand.nextInt(16);
        (new WorldGenMinable(Amethyst.am_ore.getDefaultState(), 10)).generate(world, rand, new BlockPos(randPosX, randPosY, randPosZ));
    }
}
}

Everything is fine here. But when I try to register it in my main class like so:

GameRegistry.registerWorldGenerator(new PigGen(), 0);

It says:

The method registerWorldGenerator(IWorldGenerator, int) in the type GameRegistry is not applicable for the arguments (AMGen, int)

But AMGen implements IWorldGenerator ;-;

 

pls help!

 

Thanks!

 

[gash]

I use latest Forge for 1.8.9 MC Version.