OK... just got word from the doc that the backup to the other XP computer network drive folder was successful.
Bert... thank you again for your extensive information. I've gone into services.msc before, but mainly to stop a service and/or change the starting condition (automatic, manual, disable)... don't know what anything else really means, so didn't pay attention to the other information there. Also, I had the backup network folder on the other XP computer shared with full rights for everyone, so that wasn't an issue. And, I already mentioned to the doc that he get an external drive for backup, so he doesn't have to rely on the other XP computer (getting old too).
Wendell... thanks for your information which fixed the problem. Interesting that changing the logon in Amazing Backup requires Administrator privledges... since no other aspect of Amazing Backup seems to require it. Also, I don't recall hearing about that in the AC backup video tutorial (maybe I missed it). And, I have checked that the other XP computer doesn't go to sleep, since I've heard previously that this is a problem if the LAN doesn't "wake" the computer.
Thanks to all again. You guys are great in helping us all.