addEnvironmentMap does not work

[vrmdl]

import viz
import vizact
Hi,

I have some trouble get environment map working. Here is the sample codes provided in tutorial.
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viz.setMultiSample(4)
viz.fov(60)
viz.go()

viz.clearcolor(viz.SKYBLUE)

env = viz.addEnvironmentMap('sky.jpg')

logo = viz.addChild('logo.ive')
logo.setPosition([0,1,3])

logo.texture(env)
logo.appearance(viz.ENVIRONMENT_MAP)

logo.addAction(vizact.spin(0,1,0,60))

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I do not get the texture mapped to the logo. Anyone know the reason?
Thanks

[Jeff]

The code you posted is from a Vizard 4 example. In Vizard 3 replace:
env = viz.addEnvironmentMap('sky.jpg')
with:
env = viz.add(viz.ENVIRONMENT_MAP,'sky.jpg')