We are running virtual server R2 SP1 with a windows 2003 ent R2 host and a
guest of the same. We have been using a script to do the backups using VSS
writers and it worked a few times but now it is barfing with this:

The VSS writer for Virtual Server failed during the PrepareBackup phase,
since the backup of virtual machine HOOSIER12 failed. Retry the operation.

We have found only one other person similar with this issue, but no resolve
from what we found, anyone seen this before?

The only thing that has changed really is we loaded Exchange SP2 and
promoted this virtual machine to a domain controller.

Thanks in advance.