When my biome generates in the overworld it just mountainous stone with black water.

The filler block and top block don't generate and it spawns Vanilla mobs.

 

public class BiomeBadlands extends FCBiomes
{

    public static int treesPerChunk;

    protected BiomeDecorate decorator;
    private WorldGenerator WorldGenOWBloodTreeSmall;
    private WorldGenerator WorldGenOWBloodTreeMedium;
    private WorldGenerator WorldGenOWBloodTreeLarge;

    private WorldGenerator WorldGenOWRockSmall;
    private WorldGenerator WorldGenOWRockTall;

    private WorldGenerator WorldGenOWGrass;
    private WorldGenerator WorldGenOWThorns;
    private WorldGenerator WorldGenOWDeathPlant;
    
    public BiomeBadlands(int biomeId)
    {
        super(biomeId);
        BiomeBadlands.treesPerChunk = 0;
        this.topBlock = HorrorReg.bloodGrass;
        this.fillerBlock = HorrorReg.bloodstoneRock;

	this.WorldGenOWBloodTreeSmall = new WorldGenOWBloodTreeSmall();
	this.WorldGenOWBloodTreeMedium = new WorldGenOWBloodTreeMedium();
	this.WorldGenOWBloodTreeLarge = new WorldGenOWBloodTreeLarge();

	this.WorldGenOWRockSmall = new WorldGenOWRockSmall();
	this.WorldGenOWRockTall = new WorldGenOWRockTall();

	this.WorldGenOWGrass = new WorldGenOWGrass();
	this.WorldGenOWThorns = new WorldGenOWThorns();
	this.WorldGenOWDeathPlant = new WorldGenOWDeathPlant();

        this.setBiomeName("Badlands");
        this.waterColorMultiplier = 0x1d0000;
        this.spawnableCaveCreatureList.clear();
        this.spawnableCreatureList.clear();
        this.spawnableMonsterList.clear();
        this.spawnableWaterCreatureList.clear();
        this.spawnableMonsterList.add(new SpawnListEntry(EntityBat.class, 50, 1, 5));
        this.spawnableMonsterList.add(new SpawnListEntry(EntityBombskit.class, 50, 1, 5));
        this.spawnableMonsterList.add(new SpawnListEntry(EntityHobbe.class, 50, 1, 5));
        this.spawnableMonsterList.add(new SpawnListEntry(EntityHollowMan.class, 50, 1, 5));
    }
    @Override
    public BiomeGenBase.TempCategory getTempCategory()
    {
        return BiomeGenBase.TempCategory.MEDIUM;
    }
    @SideOnly(Side.CLIENT)
    public int getBiomeGrassColor()
    {
    	return 0x443333;
    }
    @SideOnly(Side.CLIENT)
    public int getBiomeFoliageColor()
    {
    	return 0x443333;
    }
    @SideOnly(Side.CLIENT)
    public int getSkyColorByTemp(float par1)
    {
    	return 0x443333;
    }
    public WorldGenerator getRandomWorldGenForTrees(Random par1Random)
    {
    	return (WorldGenerator)(par1Random.nextInt(5) == 0 ? this.worldGeneratorSwamp : (par1Random.nextInt(10) == 0 ? this.WorldGenOWBloodTreeSmall : this.worldGeneratorTrees));
    }
    
    @Override
public float getSpawningChance()
{
	return 0.5F;
}
    
}

Anybody?