SSR 2011 launch backup from command line

Ok so we want to hide the tray icon for SSR 2011 as we manage it all via Altiris 7.1.
When you setup a machine for backups it will not start automatically and our guys at the sites want an immediate backup.

So anyone know how i can get a backup to launch via command line? I tried searching but just came up with ways to install via command line.