When you give the snapshot name for SD command make sure it is one of following:
%SNAME-%SNAP_TYPE_recent or %SNAME_%SNAP_TYPE_%SNAP_TIME
This is of course documented in the IAG so please look at that for further examples
In addition you will need to allow permission for SD command from agent. Edit the config/agent.conf file and add:
command: sdcli
Regards,
Keith