What disk did you put it on? A CDR would have a read-only flag you need to deal with.
In closing, type...
Into google.com to learn how and what to do with backups in OL2003.
As you can read at slipstick.com, OL2003 remover NETFOLDERS so you can't share like you could before.
I am using Outlook 2003. And would like to share one of the folders from the address book with my sons computer who is also running Outlook 2003. I have tried to export to a .pst file put it on disk, move it to his computer and then import, but keep on getting a pop up notice saying that i don't have permission. I can restore it on my own computer. Help!!