Online Backup of Server 2012 VM on Hypver-V 2008R2 not possible?

Hi Guy's,

I'm new to DPM cause we are recently decided to move away from our not so good old Backup Software.

Now i'm trying to Backup a Hyper-V 2008R2 Server (no cluster). There are 3 VM's wich run Server 2012 and i DPM Says it cant do a online Backup.

I check for these things:

• The Backup (Volume Snapshot) Integration Service is disabled or not installed.
• A virtual machine has one or more dynamic disks.
• A virtual machine has one or more volumes that are based on non-NTFS file systems.
• In a cluster configuration, the virtual machine Cluster Resource Group is offline.
• A virtual machine is not in a running state.
• A Shadow Storage assignment of a volume inside the virtual machine is explicitly set to a different volume other than itself.

Is is maybe not possible to backup the 2012 VM'S online on the HV2008R2 Server? Or do i have a other Problem?

Any hints a welcome.

thank you, regard

Stefan