Port mapping & NAT are not working under 10.2 Server

Hi, I'm having issues setting up the 10.2 server to handle port mapping while running NAT. I currently am using IPNetShareX (after reading the tutorials on setting up NAT under 10.2 manually, I decided to take the 30-sec route and those tutorials do not mention anything about port-mapping). I read over IPNetShareX's site and found directions for setting up port mapping ( http://www.sustworks.com/site/prod_gnat_port_mapping.html ) but I continously get this error: "natd: Unable to bind divert socket.: Address already in use" when I try to do anything with this command: "sudo natd -n en0 -redirect_port tcp 192.168.0.1:80 80". I have tried different ports, tcp and udp, different IPs, non-existant IPs, closed ports, etc. No luck whatsoever. And all the information is correct in the command as far as I know. I am not running any firewalls or anything, as far as I know, that should be messing with natd or ipfw. I've read over the applicable man files, everything looks OK. This seems like it should work, yet it doesn't! Galen P. Zink blueandwhiteg3 at softhome dot net