ntbackup lock a file and do not terminate / ntbackup hang up the server

[Carrie]

I have written a batch file to shut down my domino server
and then backup all the data in Lotus Directory, after the
backup is finished, then the tape will be ejected and then
start up the domino server again.

My problem is, ntbackup always lock one of the file
(c:\lotus\domino\data\mail\cherry.nsf) and do not
terminate (it is needed to kill it in task manager).
I have try to backup data in another directory, in which
the following batch works properly and do not have any
error.
Thus I guess it is not the problem of the batch file, then
I try to use the ntbackup program directly to backup the
problem file (c:\lotus\domino\data\mail\cherry.nsf), the
server is hang up while backing up the file.
Do any one have any idea?? How can I fix this problem??

Thanks a lot. : )

Here is the batch file:
net stop "Lotus Domino Server (LotusDominoData1)"
sleep 120
echo off
start /wait C:\WINNT\system32\NTBACKUP.EXE
backup "@C:\Documents and
Settings\carrie_admin\Local Settings\Application
Data\Microsoft\Windows
NT\NTBackup\data\DailyBackup.bks" /n "FRI-A" /d "FRI-
A" /v:no /r:no /rs:no
/hcn /l:s /m normal /j "FRIJobA" /t "FRI-A"
rsm eject /pf"FRI-A - 1" /astart
net start "Lotus Domino Server (LotusDominoData1)"

Carrie