Error while performing Hyper- V backup using symantec backup exec 2010

[acabezas7]

Hi I have a windows 2008 server with Backup Exec installed and I am trying to backup my VHD files from my virtual server. I have 6 in total and during the backup process it runs great until it starts to backup one of my virtual server which is a Windows 2003 64bit server with SQL 2005 installed. The error I get in backup exec is the following below:
Job ended: Sunday, November 07, 2010 at 3:28:20 AM
Completed status: Failed
Final error: 0xe000fed1 - A failure occurred querying the Writer status.
Final error category: Resource Errors

For additional information regarding this error refer to link V-79-57344-65233

BackupV-79-57344-65233 - AOFO: Initialization failure on: "VRTSRV::\\PHSRIDCVS01.riepf.com\Hyper-V?Virtual?Machine\PHSRIDCDS04 Windows 2003 Server 64 bit with SQL 2005 for DOHMH". Advanced Open File Option used: Microsoft Volume Shadow Copy Service (VSS).

Snapshot provider error (0xE000FED1): A failure occurred querying the Writer status.

Check the Windows Event Viewer for details.

Writer Name: Microsoft Hyper-V, Writer ID: {66841CD4-6DED-4F4B-8F17-FD23F8DDC3DE}, Last error: The VSS Writer failed, but the operation can be retried (0x800423f3), State: Failed during prepare snapshot operation (8).