ipfw questions

[Dennis Antunes]

When specifying: firewall_type="/etc/firewall.local" in rc.conf, loading
of my config file fails with: ipfw: bad arguments, for usage summary
``ipfw''
Receive same error at command line when entering: ipfw
/etc/firewall.local 
Apparently an invalid argument/bad syntax. 
The syntax is from a FreeBSD tutorial.
Can anyone help?
Also, how do definitively know if you are running ipfw2?
Thanks for the help,
Dennis