Updating client Snaphostclientsoftware

I'm traying to install de Snapshotclient software on a Linux REd Hat with Netbackup version 6.5.3

The master server is on 7.5.0.3 Netbackup versión. When i try this:

update_clients -ClientList clientes -Install_SNC

the error is:

Cannot update client xfich_gestion
        Invalid hardware type "Linux" and/or operating system "RedHat2.6"
        or client binaries are not installed on the server.

Can anyone help me?