Italian version and update to 5570

Hi,
I bought 3 weeks ago parallels desktop 3.0 thinking to solve many of my problems using XP inside MAC........Leopard is ready for the world but parallels is not ready for Leopard!
I already installed the official 5160 update but it's not still possible to work with Parallels Desktop....it seems that windows xp alive within the mac like a devil....we will have need of an exorcist?
I have seen that a new beta update was been released today...the 5570.
I downloaded and installed it but my activation key is not accepted for this kind of version.
What means? Can you help me?


Pietro.