What does the Ref error: 05-20-23-00-8081
mean in Seagate Backup Exec 2.0i?

I am using a Seagate STT20000A drive and Windows 98 OSR2.

I just applied Veritas technote
seer.support.veritas.com/docs/18668.htm which told me to change the below
DLL files in C:\windows\system to *.SAV
I changed:
citwbase.dll
citwdmk.dll
citwsrv.dll
citwhsrv.dll
maswmx.dll

I got the message after configuring a backup and then pressing start.