Hi, it's me again with the problem. As I mentioned, the computers are on a Workgroup, not Domain. In the "Advanced Settings" in Amazing Backup, clicked on "change logon", entered the Win XP computer name into the User Account box, left Domain and Password blank. Got message that "could not verify the specified account". Tried entering "Workgroup" (actual workgroup name) into Domain box, same message. Passwords are blank on the Win XP computer.
As I mentioned above, if left as "Local System", and click the "Backup Now" button, the backup to the Win XP computer works fine. It's only a problem with the Scheduled Backup that apparently needs to log on, but I don't know how.
Thanks again...