[1.8] [SOLVED] Launching Things with Swords

EDIT: It turns out I was dumb and forgot to set the item to use my class - it was using the default sword class.

Hello,

I'm trying to make a sword that launches the user and the target into the air. I successfully made an item like this in 1.6.4 sometime last year, but the code is no longer working for me. The sword itself loads in the game fine, the launching part just doesn't work. This is the code I'm using:

@Override
public boolean hitEntity(ItemStack stack, EntityLivingBase target, EntityLivingBase attacker)
{
	target.setVelocity(0, 1, 0);
    attacker.setVelocity(0, 1, 0);
    stack.damageItem(1, attacker);
    return true;
}