my item can't do damage to mobs

S9:
Cooldown: 5
Skills:
- projectile{onTick=S10;onHit=S11;v=30;i=1;hR=1;vR=1}

S10:
Skills:
- effectarticles{p=happyVillager;amount=40;speed=0;hS=0.2;vS=0.2} @origin

S11:
Skills:
- damage{a=20}
- potion{type=SLOW;duration=100;lvl=2}
ITEM

K3:
Id: GOLD_SWORD
Display: '&3OuO!?'
Attributes:
MainHand:
MovementSpeed: 0.10-0.15
Lore:
- '&6OuO'
Options:
Unbreakable: true
Repairable: true
Enchantments:
- KNOCKBACK:20
Skills:
- skill{s=S9}...

my item can't do damage to mobs