Does the nsr_exchange2010 binary support Exchange 2010 SP1?

I am trying to backup an Exchange 2010 SP1 server (part of a DAG) which is running on Windows Server 2008 R2.  When trying to execute a backup I receive the following error:

savegrp: suppressed 80 lines of output.

>> * Including writer "Microsoft Exchange Writer":

>> + Adding component: \Microsoft Exchange Server\Microsoft Information Store\ExchServ1\address

>> + Adding component: \Microsoft Exchange Server\Microsoft Information Store\ExchServ1\address

>> + Adding component: \Microsoft Exchange Server\Microsoft Information Store\ExchServ1\address

>> COM call "m_pVssBackup->AddToSnapshotSet" failed.

02/03/2011 12:24:06: Error: VSS reported AddToSnapshotSet failed, please check Windows event log for details

Any help would be greatly appreciated.

Many thanks

Rich