Fusion 7.0 and Win 8.1 Bootcamp with a MBPr 2014: Swapped 2 keyboard's key

HI, after the upgrade from Fusion 6 to 7 Pro i have found that 2 keyboard keys are swapped in my Win 8.1 bootcamp VM.

I have an italian Keyboard with a MBPr  2014.

When i press the upper left key with symbol \ |  i get the symbol as if i press the bottom left key < > and viceversa.

What's happened ???

Thanks in advance

PS:
When i start bootcamp all works fine and inside OsX all works fine too !!!!