Help with Server

[bakeit]

ok so basicaly, i have this image up on my computer :

i have to type it out:

service name : assault cube
service description:

server ports
protocol|| Server ports||
TCP Any-> 28763-28764
UDP Any->28763-28764

apply-|||||-cancel


so after that i added my router IP as the port, and the assault cube with this thing above as the application...


then i go to my assaullt cube game thing in the server tab
on my MACBOOK pro 13''

here is what i type :

description: \f1|RK| \f3>bakeit< \f2ClanServer
server password:
admin password:
max clients: 20
advanced options:
_________________________________________

in this box at the bottom of all the random green words it says :

WARNING: master server registration failed: failed pinging server.




PLEASE HELP ME WHAT DO I DO. I FORWARDED MY PORTS. AND IT WONT WORK!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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also i did VERY CAREFULLY READ THIS PAGE, AND STILL WONT HELP ME http://www.scribd.com/doc/24621937/Mac-Server-Tutorial

I READ IT LIKE 4 TIMES, AND FORWARDING MY PORTS WONT WORK OR SOMETHING IDK. HELP ME PLEASE