Using BootCamp and Parallels?

Hi,

i'm a newbie to both Mac and Parallels. Vista made me make the switch ;-)
Anyway, i'm running Leopard on a MacBook, installed BootCamp with WinXP and finished it off with Parallels.

Within Leopard, everyting is running fine.

But the problem is when i try to boot natively within WinXP. After making the switch within the "Startup Disk" setting, the system reboots, but after startup i've a blank screen...

I'm i missing something? Or can one no longer boot natively within XP after installing Parallels?

Regards,
Roger