UE4 4.21.2 - Terrain Material Tesselation is not working

Hey guys,

i’am using actualy UE4 version 4.21.2 (newest one) and want to have displacment on my terrain. Iam using the material setup you can see on the images below. But it dont get any “pushed” out geo result. I dunno what iam doing wrong or is there maybe an issue in the new ue4 version? Would be cool to know how to achive it.

Tesselation options are turned on: Pn triagnles / crackfree