Norton Save and Restore Multiple Backup Destinations Error

I am trying to backup to both a second internal hard drive and an external hard drive using Norton Save & Restore V2.  It appears to be working.  However, when I disconnect the external hard drive and then try to open Norton Save and Restore I get an Error - “Norton Save & Restore Service Connection - This program is unable to connect and communicate with the Norton Save and Restore backup Service on …”.  I understand that it can not see the external drive, but I would have thought I should still be able to see the backups on the 2nd internal drive.  It will defeat the purpose of backing it up to two places if I need the external drive to access either backups  Any suggestions?  Thank you.