Soap fault detected, Get In-Use Block problem, Msg:'SOAP 1.1 fault: "":ServerFaultCode [no subcode]

Hi,

Tecnical Details:

T:

Vcenter : 5.0.0

Avamar server: 6.1.2-47

Proxy Avamar for Vmware: 6.1.102-47

Guest OS Windows 7 (64bits)

HW Version: 7

DataStore: NFS

c:  We have a problen with our backups of the Virtual Desktop with Avamar.

The backups take a long time to finish, because always are FullBackup.

Then, I investigate for too many time.

The problem is that the backup never use Change block traking.

We have this Warnings about the CBT

D:

2014-01-16 01:02:08 avvcbimage Warning <16004>: Soap fault detected, Get In-Use Block problem, Msg:'SOAP 1.1 fault: "":ServerFaultCode [no subcode]
"A specified parameter was not correct. 
deviceKey"
Detail: 
  
   
    deviceKey
   
  
2014-01-16 01:02:08 avvcbimage Warning <14654>: The in-use blocks (pass 1) could not be found for 'Avamar-138983047098115ab9ec2565c39915e25559ce72324e51e075', using disk extents.
2014-01-16 01:02:08 avvcbimage Info <14660>: In-use block offsets for disk 2000:
  Offset:0, Length:53687091200
In-use Block offsets complete, count=1, totals: in-use=53687091200, unused=0 
2014-01-16 01:02:08 avvcbimage Info <16058>: changed-block or in-use lists are unavailable, performing full level zero backup

   

I found some solutions KB for other backup  server as VeeamBackup or symantec.

I made the steps of this KB for Veeam but never work for me, and I cannot found any KB for Avamar.

KB1113: How to reset CBT

the problem is that Avamar, after de full backup not reenable de CBT.

I enabled manualy, but the same problem again.

Do you have any help for me?