import failure

Having backed up the Outlook Inbox, Sent Item, etc to pst files prior to the build of Windows 7 Home, I get this message when I try & import the data back into Outlook. A Google search would indicate that this is a pretty common occurrence on other platforms as well but does anyone know why...

Sorry for the long post :( I have 7 hard disks, all SATA 3 - are a hardware based raid 5 array 4 - are a raid-5 dynamic volume. All disks are intact no damage. Dynamic volume was used 2 hours ago, no issue I wanted to load windows 7 on it to see how it would perform on this machine. So...