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Tessellation Problem

Hello everyone,
Please help me to solve this problem!
I made a material but the tessellation doesn’t work.
The edge still looks smooth and no bump.
I’ve watched a lot of tutorials and and tried the exact same thing other people did, it worked for them perfectly, but I don’t see any displacement on my material and don’t see tessellation in wireframe mode either…
Here’s a screenshot of my setup:

Screen Shot 2017-04-27 at 2.12.56 PM.jpg

Can anyone please help me?
I really want to know what’s wrong with my setup…
Thanks in advance!

Can you remove the Object Radius node and Plug in the Red Channel of your Texture instead of the colors Channel and try if this works?