People can't listen

[Burningsoul]

Hi,

I just started my new radio station and I can connect to the server but people can't listen to my radio.
Shoutcast says always:

<02/26/04@22:13:01> [yp_add] yp.shoutcast.com gave extended error (Cannot see your station/computer (IP: **.***.***.**:****) from the Internet, disable Internet Sharing/NAT/firewall/ISP cache (Connection timed out))

When i shutdown zonealarm the message still appears.
Help me, what can I do?