Does the same thing happen when you run the following?
Code:
import viz
#Tell Vizard to go fullscreen on monitor 2
viz.setOption('viz.fullscreen.monitor',2)
#Create window
viz.go(viz.FULLSCREEN)
gallery = viz.add('gallery.ive')
If so, do you see any errors in the Vizard input/ouput window?
Does your projector require a different resolution or refresh rate?