DeskScapes and crash whit vista ultimate 64 bit

Hi, I use deskScapes 3, in the Italian version although I always do all updates from Impulse, I still always have problems using it.
I have Vista Ultimate 64 bit.
When I open the software it works only with some themes, if I select others, I get stuck everything.
To use all the themes of DeskScapes 3, I go directly into the Dream folder ,select what I want to use.
But now, with version 3, I can not see the preview of the themes folder selected, all have the same default icon.
Shortly, I bought an original software, but I can not use it on its full functions.
Thank you for your attention.