Hi DG,
I've just tried with Chainer and Play loads correctly (at least the 32 bit version). So, as you said, it's a VE Pro problem. And this conclusion is pretty obvious having said that Play is not (yet) supported under VE Pro.
Again, my only curiosity regards the way some people managed to make it possible in a similar configuration (Windows 7 64 bit): as an IT Engineer I can't believe it's just a matter of humidity, pression, temperature, pollution or some other kind of meteorological conditions! [;)]
And if it's a matter of IT conditions, that environment has to be reproducible.