ERROR volume shadow copy: 0xffffffff

good day.

guys, i need help…i can’t successfully create a backup using ntbackup on windows 2003 server…this error keep on appearing…

Backup Status
Operation: Backup
Active backup destination: 4mm DDS
Media name: “Media created 7/7/2006 at 5:23 PM”

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.

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The operation did not successfully complete.

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AD DB & Log are both on C: drive…

i tried registering dll files except for msxml4.dll (not found) …volume shadow services are enabled…

any help will be much appreciated..thank you…