Problem: import .osgb from vizard

[roosfcch]

Hi everyone!
I'm getting started with Vizard.
I'm trying to use the 'ground.osgb' that it's contained on vizard but it appears like a black background.
When I run the code on the college computers' this problem doesn't exist.

import vizact
import viz
viz.go()
ground=viz.add('ground.osgb')
ground.collidePlane()

Thanks!