What properties did you change?
I had changed orientation from Portrait to Landscape under Finishing tab.
Do our unmodified GoDiagram samples work? If they do, it must be something you’ve done in your overrides.
Even i tried with unmodified GoDiagram sample application Demo1, but there is same problem with print preview functionality.Print preview screen appears, but it doesn’t show anything.
Well, we know Demo1 Print Preview works in the typical case, so I’m guessing it’s something about the way you have printers set up on your system.