Event ID 17055

I posted this over in the sbs2k with no answers I hope someone here can shed
some light on this. Sorry if this is not the right group.
We have a sbs2k doing a nightly full backup using Veritas BE 9.1 the backup
completes successfully with no errors but in the event log I find these
event errors that have been log during the backup. Is there anything I can
do to solve this? There will be 8 of these in the log.
Thanks
Tim
Event Type: Error
Event Source: MSSQL$BKUPEXEC
Event Category: (2)
Event ID: 17055
Date: 3/15/2004
Time: 10:52:29 PM
User: administrator
Computer: SBS001
Description:
18272 :
I/O error on backup or restore restart-checkpoint file 'C:\Program
Files\Microsoft SQL Server\MSSQL$BKUPEXEC\backup\master4IDR.ckp'. Operating
system error 3(The system cannot find the path specified.). The statement is
proceeding but is non-restartable.
Data:
0000: 60 47 00 00 10 00 00 00 `G.....
0008: 10 00 00 00 53 00 42 00 ...S.B.
0010: 53 00 30 00 30 00 31 00 S.0.0.1.
0018: 5c 00 42 00 4b 00 55 00 \.B.K.U.
0020: 50 00 45 00 58 00 45 00 P.E.X.E.
0028: 43 00 00 00 07 00 00 00 C......
0030: 6d 00 61 00 73 00 74 00 m.a.s.t.
0038: 65 00 72 00 00 00 e.r...To resolve this, create a directory named backup under C:\Program
Files\Microsoft SQL Server\MSSQL$BKUPEXEC\.