I'm having this same problem
I have SBS2003 R2 SP2
When i try to use ntbackup it returns the message:
Backup Status
Operation: Backup
Active backup destination: 4mm DDS
Media name: ""Pembroke BK 24/11/2005 AT 22:12""
Volume shadow copy creation: Attempt 1.
Timeout before function completed
Error returned while creating the volume shadow copy:0xffffffff.
Error returned while creating the volume shadow copy:ffffffff
Aborting Backup.
----------------------
The operation did not successfully complete.
----------------------
I've tried to register dll
I've applied SP2 to Windows 2003 and SBS2003
Nothing worked
I'm asking you help if anyone already experienced this problem and solved it
sucessfuly
Tk.
May be you can try again
URL http://support.microsoft.com/kb/940032
The above article has review on : October 11, 2007 Revision : 2.1
Hope it can help!
Thanks,
Randal