Moving Mesh with Solid Mechanics and Electrostatics

Hi,

I am trying to model a capacitive force sensor in COMSOL using solid mechanics and electrostatics physics. The model consists of a nylon spring between 2 silicon capacitor plates that experience a boundary load to change the capacitance. I am able to compress the spring and obtain a capacitance reading with a 10V terminal plate and an air dielectric but the capacitance reading does not change with the change in distance between the plates. I have applied a parametric sweep of the boundary load but the capacitance remains unchanged. I attempted to utilize a moving mesh with a prescribed deformation of w in the dz direction but the capacitance still does not change. If anyone has any suggestions on how I can obtain a changing capacitance reading with this current setup that would be helpful.

Thanks,
Josh

Due to a file size error, I have attached an image of the current setup

Edit: I removed the mesh in order to post the model.