You might not be able to see it on the master list for you, but other people may be able to see it.
See if you can find it on one of the server browsers:
here or
here.
You can also try giving out your IP and server port and ask people to try and custom connect.
or
You might not have your ports forwarded either. This is a part of what I wrote some time ago about port forwarding. It will help:
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How To Port Forward
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If you connect to the internet thru a router, you will need to forward ports on your router in order for it to let the server pass thru your router and get on the actual internet (master server).
Most people ask? Do I have a router? Well, this is how you find out:
Assuming you have high-speed internet, you use an ethernet cable, or airport (wireless) to connect to the internet. Now, the question is, do you connect the ethernet cable directly to your modem.
What's a modem? Well, some modems are made by motorolla and company's like that. It has status lights on it that tell you if you are sending and receiveing packets (basically if you're receiving internet).
What's a router? Well, there's an ethernet cable connecting the router to the modem. Router's are made by linsys, d-link, netcom and other companies. This also has status lights, but these just show if Computer A is connected to Slot A in the router and on the internet.
99% of the time that your server doesn't show up on the master list is because you haven't opened your ports. You do this by port forwarding.
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DIRECTIONS!
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I had trouble port forwarding also. This is what you need to do:
Follow the directions on this site:
http://www.portforward.com/english/appl ... 3index.htm
You won't be able to forward all the ports, but be sure to get port 4534 in there. Ports 4530-4540 should be sufficient.