Added Saddle Doesn't Work On Horses

I am making a mod, and I added a new saddle. It works as a regular saddle would, except it only works on pigs. I searched through many classes and still didn't have a clue. Please help!

I am using Forge 1.6.4-9.11.1.964

The source code for the saddle is shown in the following spoilers

Main class

public static ItemSaddle DarkSaddle = (ItemSaddle) new DarkSaddle(6982)
    .setMaxStackSize(64)
    .setCreativeTab(tabDarkHorsing)
    .setUnlocalizedName("evil_saddle")
    .setTextureName("darkhorsing:dark_saddle");

DarkSaddle class

package mod.magicreality.magicrealitymod22;

import net.minecraft.item.ItemSaddle;
import net.minecraft.item.ItemStack;
import net.minecraft.creativetab.CreativeTabs;
import net.minecraft.entity.EntityLiving;
import net.minecraft.entity.passive.EntityHorse;

public class DarkSaddle extends ItemSaddle {

public DarkSaddle(int par1) {
	super(par1);
}
}