Wrong keyboard mapping in guest OS

Hi all,

I', running fusion 4.1.1 on Lion.

I built up a VM with Lion too as a guest OS.

I realized that my keybord in my VM isn't well mapped.

In fact I have a couple of keys which, if pressed, don't correspond to the right character.

The keybord, which is an apple wireless keybord with italian layout, works fine in the host environment.

How can i fix this problem?

Thank You

Regards