Corrupt Outlook 2007 pst file

I am using Outlook 2007 on a Windows 7 system. Yesterday I needed to restore the system drive from a previous drive image, so I saved my Outlook personal folder file to a different drive, and then copied it back to the Outlook folder after the restore operation. Outlook would not start, reporting that the pst file was corrupt. I ran the Inbox Repair Tool, which found and fixed errors, but Outlook continued to report that the file was corrupt. I have Outlook 2000 on a different machine running Windows XP, and this pst file works OK on that system. If there is a way to make it usable on my Windows 7 machine, I would appreciate it. The file is greater than 50MB in size, so it is not attached.