Particules Display in the scene

Hello everybody,
I am playing around with some scene i downloaded and wanted to import particule effect from another project.
I tired to tweak the matérials, emissive, the post process volume, but i can’t get this fire working properly in the scene. The transparence is there, but the fire maps don’t display…
No problem for animation (i can see the plans moving) but i should look at a fire. There are some other fire place in the level that works fine.
It looks fine in the preview mode (Pic2), but nothing in the scene (pic01).
Those particules come from an older Unreal version…
Does anyone have an idea on what’ going on ?
Thanks !!


Up with this topic…
I tried different flames and it seems that it’s a scene probleme…
When I open the editor window, the flame looks perfect…

Why is it all black in the scene ? Does anyone have a clue ?