please help me with this...

[nkanani]

i have this message come up in the server log

<10/10/02@13:46:15> [yp_add] yp.shoutcast.com gave error (nak)
<10/10/02@13:46:15> [yp_add] yp.shoutcast.com gave extended error (please type something else in the stream title/description field)

what does this mean...also other people cannot hear my music. i am a bit confused about what ip address i use. i have a adsl connection and the isp assign me a IP address. do i use this one for people to hear my music or the one given to me be whatsmyipaddress.com. that one was different... also im not sure if im behind firewalls, NAT devices, web caches at the ISP, proxy servers etc. i am using a stand alone pc connected to the net via adsl.......please help