Niagara set/change material in BluePrints?

Hi,

How can I set or change material in Niagara system? I have a simple Niagara system with one emitter and one sprite renderer in it. But I just can’t change material of sprite renderer using BB for some reason, I’m using SetMaterial(Niagara) node. Here is the setup:

http://prntscr.com/okx1sv

I’m also having issues with CreateMaterialInstance(Niagara) node, it just can’t see the material, but I have only one material and one sprite rendered, so the index should be 0, right?