Object falling through the floor

Hello, i have a problem, i created an object with a procedural mesh, but i can´t test if it works, because the item keeps falling to the infinite, i tried to add a collision box, but the box apears where is in the image, however even that box doesn’t make a collision with the floor, how i add the collision boxes?

yes, it has collider

Is your procesural mesh component set to block all collision?

i don’t know how, but i fixed haha well anyway thank you

does your floor have a collider?