you are right, this is most likely an issue relating to your graphics card
or graphics drivers or graphics memory.
we have in general found ATI cards to be more problematic than nVidia based cards, and specifically laptop graphics cards are more restricted in functionality.
one thing you can try (sometimes helps with nVidia, don't know about ATI) is to play around with different version of the graphics card drivers.
it's possible that Vizard3.xx uses some newer features for it's scene graph that were not supported with your old card/driver. sometimes updating the driver or trying a different graphics driver helps.
clearly that's all experimental and might just be a waste of your time. if you have the budget, purchasing a laptop with nVidia graphics (or even newer onboard graphics) will solve your problems.
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