SIP extensions does not register with Asterisk Now

Hi,

I’m new to Asterisk, I have installed ASterikNow, however, after installation I couldn’t get a phone register with Asterisk.

I can login to Asterisk machine by accessing the web Interface.
Status show Green “OK”

localhost*CLI> core show version
Asterisk 1.4.24 built by root @ localhost.localdomain on a i686 running Linux on 2009-03-20 21:27:25 UTC

In Ethereal I see the Destination port not reachable.
I ran netstat on the Asterisk box & I see the following,

[[email protected] asterisk]# netstat -a | grep ^udp
udp 0 0 *:58402 :
udp 0 0 *:itm-mcell-s :
udp 0 0 *:831 :
udp 0 0 *:bootpc :
udp 0 0 *:mdns :
udp 0 0 *:sunrpc :
udp 0 0 *:ipp :
udp 0 0 *:39570 :
udp 0 0 *:mdns :
[[email protected] asterisk]#

There is no 5060 running on Asterisk. Do I have to change anything?
The problem Im facing is, I dont know where to start.

Regards,
Sylvester,
Boca Raton, US

After rebooting, I can see sip in netstat. however now I get 404 not found for my extensions.