Backup status overlays not displaying for administrator account

I am running Norton 360 v6 on a Windows XP desktop.

There are two user accounts (1 x administrator & 1 x limited user) set up on the desktop.

Backup has been configured and I have verifiied that the files for both accounts have been backed up to an external USB drive.

Backup Status Overlays are swithched on.

However;

For the administrator account the green check mark visual indicator is NOT displayed.

For the limited user account the green check mark visual indicator IS displayed.

I have switched the overlays off, restarted the computer, switched the overlays back on, restarted the computer and manually started the backup but still the green backup status overlay does not display for the administrator account even after creating two new documents.

Is anyone able to help as I have spent hours on this forum and googling to find a solution.