Norton Ghost - Backup to BluRay - the backup almost always fails

I have tried to backup my drive to BR, but the backup usually always fails with the errors below. I have looked into the history of the case

 

http://community.norton.com/t5/Other-Norton-Products/Ghost-15-and-Bluray/td-p/263925/page/4

 

and it looks so there is some magic DLL which could solve the problem. Can i have it, pls?

 

the errors are:

 


-Error E7D4000C: This device or media failed to mount: 421.

(UMI:V-0-2004-12)

 

Error EC8F17B7: Cannot create recovery points for job: Drive Backup of System Reserved (*:\).
    Error E7D4000C: This device or media failed to mount: 421. (UMI:V-281-3215-6071)

Details:
Source: Norton Ghost