different result in render - can't see the modifier “vertexWeightProximity”

Question

i'm new to blender..

no idea why, in finall render can't see the effect - modifier "vertexWeightProximity" i'v applyed on my sphere... it's affected by a box as it shows in this tutorial: https://www.blendernation.com/2015/01/06/quick-tutorial-how-to-create-a-sci-fi-shield/

this is the render mode in viewport (Cycles Render):

the render results:

even in blender render mode:

Please SOS ! thanks!