navmeshsurface not working?

I am newb to unity , and im practicing creating 3D mini horror game. i have an enemy that will follow and attack the player when near

My problem is when i manually set the Navmesh on a gameobject like the floor, it works
but when i use the Navmesh Surface it doesnt even move..both agent is default at Humanoid , then i try to create another agent if it works and set the navmesh surface agent same as the enemy but still doesnt work

What i lack and do wrong?? Need help Thanks

 

You doing something wrong. Use this as reference https://docs.unity3d.com/Manual/class-NavMeshSurface.html
Also, its impossible to trouble shoot without code snippets or screens