Corrupted Money backup files

There are a few things you can do. Manually open up the *.mbf file, does it open?
If it doesn't, the file type *.mbf may not be associated to Money 2007 anymore. Very common.
If the file becomes too large they also become corrupted. It may be possible to export the *.mbf file to Microsoft Excel. Make sure you create a copy of the file before manipulating it.

http://support.microsoft.com/kb/279274

Actually.... if you have a system administrator. They should have a back up tape, you should already have a path to the file you can give them. They can do a backup and restore of a day or two ago and see if that mbf file was not corrupted as well.

Let me know if I can be of anymore help =)

Good luck!