behind a school network?

[chemical5x]

I think i'm getting it close to functioning properly. but I get an error message:
<01/20/03@18:37:55> [yp_add] yp.shoutcast.com gave error (nak)
<01/20/03@18:37:55> [yp_add] yp.shoutcast.com gave extended error (404 Cannot see your station/computer from the Internet, disable Internet Sharing/NAT/firewall/ISP cache)


I know there are other posts about this error, that say to stop any firewalls on your computer and etc., but would my school network still have some sort of firewall up preventing people from the 'internet' to upload from the school network?

I turned the internet sharing function off, and turned off the built-in firewall (my OS is XPpro). I also changed the Yport from 80 to 666 (like someone suggested) but then the error became even worse:
<01/20/03@18:44:25> [yp_add] yp.shoutcast.com gave error (nak)
<01/20/03@18:44:25> [yp_add] yp.shoutcast.com gave extended error (Cannot see your station/computer (IP: 143.207.69.144:80) from the Internet, disable Internet Sharing/NAT/firewall/ISP cache (Connection timed out)


Thanks for the help in advance
Mushypeas

--My apologize if this has been answered, but i haven't been able to find the answer--