Roco, I have some advice for you.
1) Check when a thread was last posted in. This has been dead for almost a year. Posting in long-dead threads is called "Thread Necromancy" or "Necroing" and makes everyone want to stab you in the face.
2) When a solution doesn't work, it isn't the right one.
3) Avoid smiley spam.
4) STFW (Search the fucking web)
4a) Do a little research and try more than one thing.
4b) Use a little common sense when posting, and try following any links found in a thread for your answer
5) In the future, don't put your clan tag in your forum name, clans are prone to die, and you're getting yourself stuck with a tag you may come to hate.
As for this thread, did you check the advice about the firewall thing. Can you access
master.tremulous.net in a web browser?
If you can't, it's likely a firewall issue.