Please help to forward port 80 to 8800 with ipfw

Hi,
I am using Apache on FreeBSD. If I use port 80 for http port, it won't
work because the security problem. So I configured Apache to listen
port 8800. Now the customer has type http://breakevilaxis.org:8800 to
get on my web site. This is no good. So I have to forward port 80
request to port 8800. I guess what I should do is to ipfw add 100 fwd
127.0.0.0,80 tcp from any to any 8800 in
But I got an error when I execute the command.
I have compiled the kernel with LINT configuration.
I did make LINT, make cleandepend;make depend;make;make install
I really do not what is the kernel I am running. I doubt it is still
the old kernel which the IPFIREWALL_FORWARD is not selected.
Please help me to achieve this.

breakevilaxis#uname -a
FreeBSD breakevilaxis.org 7.0-CURRENT-200610 FreeBSD
7.0-CURRENT-200610 #0: Mon Oct  2 05:44:21 UTC 2006
root_at_stiles.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC  amd64

breakevilaxis# ipfw add 100 fwd 127.0.0.1,80 tcp from any to any 8800 in
ipfw: getsockopt(IP_FW_ADD): Invalid argument

dmesg:
...
Trying to mount root from ufs:/dev/ad8s1a
ipfw2 (+ipv6) initialized, divert loadable, rule-based forwarding disabled, defa
ult to deny, logging disabled
bge0: link state changed to UP
...

breakevilaxis# ipfw list
00100 allow ip from any to any via lo0
00200 deny ip from any to 127.0.0.0/8
00300 deny ip from 127.0.0.0/8 to any
00400 allow ip from 192.168.0.52 to 192.168.0.0/24
00500 allow ip from 192.168.0.0/24 to 192.168.0.52
00600 allow tcp from any to any established
00700 allow ip from any to any frag
00800 allow tcp from any to 192.168.0.52 dst-port 25 setup
00900 allow tcp from 192.168.0.52 to any setup
01000 deny tcp from any to any setup
01100 allow udp from 192.168.0.52 to any dst-port 53 keep-state
01200 allow udp from 192.168.0.52 to any dst-port 123 keep-state
65535 deny ip from any to any

rc.conf
...
firewall_enable="YES"
firewall_type="client"
...

rc.firewall
....
case ${firewall_type} in
[Oo][Pp][Ee][Nn])
        setup_loopback
        ${fwcmd} add 65000 pass all from any to any
        ;;
[Cc][Ll][Ii][Ee][Nn][Tt])
        net="192.168.0.52"
        mask="255.255.255.0"
        ip="192.168.0.52"
        setup_loopback
        ${fwcmd} add pass all from ${ip} to ${net}:${mask}
        ${fwcmd} add pass all from ${net}:${mask} to ${ip}
        ${fwcmd} add pass tcp from any to any established
        ${fwcmd} add pass all from any to any frag
        ${fwcmd} add pass tcp from any to ${ip} 25 setup
        ${fwcmd} add pass tcp from ${ip} to any setup
        ${fwcmd} add deny tcp from any to any setup
        ${fwcmd} add pass udp from ${ip} to any 53 keep-state
        ${fwcmd} add pass udp from ${ip} to any 123 keep-state
        ;;