Regarding support, they have a ticket system, if you fill in the card correct you should get a support ticket # back. If you haven't you have either done something wrong or you need to make sure your service provider isn't blocking MTU emails.
Regarding your problem, as I have not herd of this particular problem before it is all guesswork to offer advise, which is probably why no one else has answered as well. You could try an earlier driver as there was a problem with some new video drivers from nvidea although the problem was different to yours.
Just to help us understand more about your set up.
Are you using this in extended mode ? if so remove the extended monitor and concentrate on single view.
When you say you just have blank boxes, can you see the marque at the top if you enable it (settings are in Tools/show display) or the singers list window at the bottom, again settings are in the show display.
The only thing I can think of at the moment is to check your screen resolution, try a different resolution. or go to your nvidea control panel and see if there are any settings there that may help. not having your video card cannot really tell you how to check it.
Sorry I can't be more helpful at the moment.
keep us informed if you find anything.
Roy.