Thanks again for your feedback.
You need to know that my new server (the MASS) where I run VE Pro is based on a Tyan server motherboard with integrated VGA. Though, since I control it through a software KVM solution (KaVooM), I don't have any video cable attached to it, for I see that server's screen through the LAN on the monitor of my host machine.
It's just a guess that it could be a kind of video driver related problem... but I can't understand why, considering the same configuration for any other software running on that machine (I've just tried FX Teleport and Play is loaded and works regularly), only VE Pro should be affected by a possible hardware driver issue.
Anyway, thank you so much for taking time to consider my problems: I appreciated.