SSR 2013 - Granular restore option

Dear All,

Spec: Windows SBS 2011 as an A/D and Exchange server
Outlook 2007 Installed. Symantec System recovery 2013 installed

When I go into granular recovery, hoping to restore some mailboxes, select the recovery point. Wait a minute or two and it goes to 'ready' but no data in the window (files, exchange or sharepint are blank).

Can anyone please help?
It's crucial this works in case of a real disaster.

Thanks in advance.
Darren.