After recent problems I've been backing up My Documents onto CDs. This has gone OK using copy and paste. I've tried to do the same with the Address Book in Outlook Express but when I try to open it from the CD get a message saying

Would be grateful for any suggestion and hope that isn't too stupid a question. I've read that Settings (?system status) should also be backed up but even though I'm an Administrator that doesn't work either using a CD. The message I get from Backup Utility is:The Address Book has been locked by another applicatation
Have no idea where that date came.The backup file name could not be used. "E:\Backup System State inc Registry 25.02.05,bkf". Please ensure it is a valid path and that you have sufficent access.