Destruct Mesh at the fall

Hello,

i Have a Destructible Mesh and make a BP with this

Now i add Apply Damage and this work if i make Begin Play node to Start but i want to Destruct Mesh at the fall, i try the Event hit and OnComponentHit nodes but dont work! Why? i try add CollisionBox but dont work what i make wrong?

Did you attach this to an on collision event ?