BackupExec 2012 error GRT-restore DAG

Dear All,

I have backup of MS Exchange 2010 (installed on Windows server 2008 R2) with Backup exec 2012 without any problems. There are two servers with CAS role (NLB) and two servers with DAG role (Failover).

I try to make GRT-restore some mailbox items and job ended with error -

Completed status: Failed
Final error: 0xe0000f04 - The Backup Exec server could not connect to the remote computer.  Ensure that a Backup Exec agent is installed and running on the remote computer.  If a Backup Exec agent is installed, ensure that it is the correct version.
Final error category: Resource Errors

For additional information regarding this error refer to link V-79-57344-3844

I try solutions by this link:

1. Redirect restore to CAS server (cluster adress and single server)
2. Add adresses of CAS and DAG servers into  hosts file on the media server.

The problem persists.

Kindly advice