How to activate vxgi in a new map? (using last build)

Hi! i just build the vxgi build of ue4, and the sci-fi demo works ok. but i can´t make it work in a new scene. i need something else? the light has vxgi activated, and the world has force no precomputed lights enabled.

it’s definitely possible to get multibounce lighting, im posting some pics with my settings