Question : Problem: mac networking, airport

I am using mac leopard.

When connected to a wireless network using my airport, sometimes the network stops, and I get a 'self assigned ip"

The wireless network works for other people,  and it worked for me to before I got a "self-assigned-ip"

so I go to 'system preferences' -> 'network' -> 'advanced'-> 'tcp/ip'
and click 'renew dhcp lease'  and this sometimes corrects my 'self-assigned-ip'  (which always begins with a '1')

And sometimes my network stays as a 'self-assigned-ip'

Answer : Problem: mac networking, airport

If you go to System Preferences > Network > Airport > Advanced > TCIP/IP and then choose the Configure IPv4 > Manually

And put in all of the correct info from when you do get a dynamic IP