NTBackup: Error returned while creating the volume shadow copy:0x8007000e.

Hello EE.

First of all let me say this is my first post, I'm not accustomed to posting on EE yet, so apologies if I don't follow etiquette.

I have a problem with NTBackup. There are Event log messages leading up to the Scheduled NTBackup task which would indicate that the Volume Shadow Copy Creation process attempts to run, but then fails (see code section which I've annotated).

I've already observed:
http://www.experts-exchange.com/OS/Microsoft_Operating_Systems/Server/2003_Server/Q_22595852.html?sfQueryTermInfo=1+0x8007000e+10+copi+creat+error+ntbackup+return+shadow+volum+while

...but I'm not sure if it applies to my situation.

NTBackups have been working fine until the morning of April 1st (I considered it to be an April Fools trick, but unfortunately not). April 2nd is here and it's still doing the same.

It might be worth noting that I can run a backup during the day absolutely fine, did so yesterday, and am doing so today.

Some hardware details:
Dual Xeon 2.8GHz
1 GB RAM
C: 19.5GB (10.8GB Available)
D: 48.2GB (17.7GB Available)

Some version information:
Windows Server 2003 Standard Edition /w Service Pack 2

The command that is run:
C:\WINDOWS\system32\ntbackup.exe backup "@C:\Backup_Jobs\DAILY-BACKUP.bks" /J "DAILY BACKUP" /D "DAILY-BACKUP SET" /F "Z:\*OURSERVERNAME*\DAILY-BACKUP.BKF" /V:yes /r:no /rs:no /hc:off /L:s /M normal

* I've modified the above for our security!

If there's any more information you require in order to diagnose, please ask as I will be only too grateful to get this issue resolved ASAP. I'm afraid I'm more accustomed to Linux than Windows server technology and this is a system I've inherited, not created from scratch, so you might have to do some handholding along the way!!!!

Thanks and Regards,

Daniel.

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Backup Log:
#########################################################
Backup Status
Operation: Backup
Active backup destination: File
Media name: "DAILY-BACKUP.BKF created 02/04/2009 at 02:10"
 
Volume shadow copy creation: Attempt 1.
 
Error returned while creating the volume shadow copy:0x8007000e.
 
Error returned while creating the volume shadow copy:Not enough storage is available to complete this operation.
 
 
Aborting Backup.
 
----------------------
 
The operation did not successfully complete.
 
----------------------
##############################################################
 
Event Log Item (two event log entries, for C: and D: - D: entry shown here...
 
##############################################################
 
 
Source:        VolSnap
Date:          02/04/2009 02:12:35
Event ID:      21
Task Category: None
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      XXXXXXX
Description:
The flush and hold operation for volume D: was aborted because of low available system memory.
##############################################################