Thank you for your answer Peter.

The material I'm trying to indent has a linear elastic function:Isotropic elasticity (Young modulus: 2000 MPa, and a Poisson's ratio: 0.22), and prony shear relaxation in order to simulate its viscoelastic properties. I don't change values in the engineering data section, since those are defined properties of the material. I'm changing them in the static structural force section. But I am not getting what I want. Changing de displacement in the static structural has worked, but it doesn't happen with the force.