Problemas para hacer backup en windows 2008 x64

Hola

Tengo problemas para hacer backup en mi servidor Windows 2008 x64 da errores
el servidor es un controlador de Dominio tiene los roles de Hiper-V, Dhcp,
File Services; tiene el Windows Server Backup Features con el cual estoy
tratando de hacer backup a otro servidor donde esta el Tape en una carpeta
compartida me sale los siguientes eventos

Log Name: Application
Source: VSS
Date: 27/11/2008 02:23:48 p.m.
Event ID: 12290
Task Category: None
Level: Warning
Keywords: Classic
User: N/A

Description:
Volume Shadow Copy Service warning: ASR writer Error 0x80070001. hr =
0x00000000.

Operation:
PrepareForBackup event
PrepareForBackup event

Context:
Execution Context: ASR Writer
Execution Context: Writer
Writer Class Id: {be000cbe-11fe-4426-9c58-531aa6355fc4}
Writer Name: ASR Writer
Writer Instance ID: {4e72ac2c-c681-4edc-b0fe-fc5c821dc428}


Log Name: Application
Source: SPP
Date: 27/11/2008 02:23:49 p.m.
Event ID: 16387
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: srvetcoldc3.etcol.local
Description:
Shadow copy creation failed because of error reported by ASR Writer. More
info: Incorrect function. (0x80070001).


Log Name: Application
Source: Microsoft-Windows-Backup
Date: 27/11/2008 02:23:49 p.m.
Event ID: 521
Task Category: None
Level: Error
Keywords:
User: SYSTEM
Computer: srvetcoldc3.etcol.local
Description:
Backup started at '27/11/2008 07:23:45 p.m.' failed as Volume Shadow copy
operation failed for backup volumes with following error code '2155348129'.
Please rerun backup once issue is resolved.