upgrade to windows 7 error?

[lancd6]

HI, i am running windows vista ultimate 64 on a mac pro 1 via boot camp,
on a separate disk, today i bought the 7 ultimate upgrade, and when
i want to upgrade i get Windows could not retrieve information about the disks on this computer.
The upgrade advisor found no problem...
What can i do!!!
Thanks
Daniel

[Raid]

You might want to check out a couple of links on the first post of this news story:

http://forums.macrumors.com/showthread.php?t=807319