Disabled collision colliding

I disabled all collision on item placer but it still colliding ingame and the last collision is reset when reloading the map in a new editor session. How to completly disable all collider on it ?
I want to make a classic pick up weapon/ammo system like in Quake III Arena and Unreal Tournament : the player walk into the item and get it unless he already have it or invenotry is full.

All collisions disabled :