[vtkusers] why not see cone in main window?

[zhu_jun8]

Hi All
    I'm a jackaroo in VTK.Now I am studying in vtkFlRenderWindowInteractor.However I'm having trouble in
compile /vtkFlRenderWindowInteractor-0.8/local/examples/Cone3/Cone3.cxx.When Build Cone3.exe I find that display result is wrong.i can't see cone in main window but 
black window.
    Please help me!
    thanks!
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