Help me about pfsense NAT LOGS TABLE

[smithssl]

hello all:

this days ,i am testing pfsense firewall,and setup log server ip to
cacti server ip !now my requestion is on the cacti (log server) can view the
firewall logs and system logs, but Anyway can't view the nat logs message !
please help me ! how to send the NAT logs table to cacti log server ! thank you
very much ！