VDP 5.1.11.3 - Problem to backup 4 of all my VMs

Hi,

I'm encontering a problem to backup just 4 VMs of all my VMs since I upgrade from ESXi 4.1 to 5.1.

To begin, I have 2 VMware ESXi.

All was OK with VMware ESXi 4.1 and VMware Data Recovery.

When I upgraded from 4.1 to 5.1, impossible for me to megrate old bachkup from VDR because of the plugin version used of VDR : v 1.x

So, after upgrading to ESXi 5.1, i began from scratch.

I created a new datastore  of 3.6To (on a NAS with iSCSI LUN)

I created 3 tasks backup.

And now I have always the same problem on always the same 4 vritual machines.

VDP : Échec de l'opération à cause d'un snapshot existant. (Fail due to an existant snapshot)
erreur
02/10/2013 16:30:16
VDP : procédure de sauvegarde
vSphere Data Protection
DOMAIN\vdp

The problem is that when I check the snapshot manager, there are no snapshot for those VMs.

When I browse the datastore, strangely, many many files like this :

VmName-0000xx.vmdk

VmName_1-0000xx.vmdk

So what is the issue ?

An other problem, maybe in link with my problem, I often have this message in logs :

Impossible de connecter DOMAIN\vdp@192.168.180.7 (Impossible to connect DOMAIN\vdp@192.168.180.7) : 192.168.180.7 is my VDP appliance IP

erreur

02/10/2013 16:34:03

DOMAIN\vdp

Thanks a lot for your help