Repairing Outlook 2007 using Scanpst.exe

I’m trying to repair a corrupted Outlook 2007 using Scanpst.exe file. I’ve tried running it for 3 consecutive times and then detecting errors and repairing the file at the same time. I plan to do this until Scanpst can detect no errors, which might result positive outputs in the past. However, on the 4th run, Scanpst reported several errors were found but there were no options to repair the file, and the backup file selection was grayed out. The only available selection was to press “OK” which simply results to the exiting of the Scanpst without repairing anything. I’ve tried closing and restarting all the apps that might access the data file but still no luck. Any of you knows possible solutions to this? I’d be grateful to those who can provide.
