Data Protector 9.01, how to get VMware GRE non-staged backup

Hello, I'd like to use the new feature for VMWare GRE restore from non-staged backup, allowing to restore a file without restoring the full VMDK.
I created a smart cache disk library, the backup is OK, but when I want to restore the file using the vsphere agent I only have "staged" backup in the list.
I don't know how to get "non-staged" backup.