Automatic layers paint by splatmap

Hi there,

I started using UE4 for the landscape rendering. I’m usually working on interior design, so it’s something very new for me. I received a request to paint the landscape, so I opened World Machine, generated splatmap and followed a very easy tutorial I found on youtube ([here][1]).
But in the moment when the layers should apply to the landscape map, nothing happened. Example what the result looks like:

There are details of the material above.
If enyone could help me, I will be very glad!

Dominik of Storytellers, s.r.o.