Airport Problem: Self assigned IP address?

[Sundance]

I'm using DSL, I've had it for about 4 weeks. For the past week or so I've been having a problem connecting to the internet wirelessly through airport after the computer goes to sleep and is rewoken(rewaken?). I get this message when i go to see the network status in the system preferences:

"Airport is connected to the network Sundance. Airport has a self assigned IP address and may not be able to connect to the internet."

For the first three weeks i NEVER had this problem, and now it shows at least once a day. I figure i might have changed something in my network preferences but i don't know what. I don't really know what dhcp or ipv6 or ipv4 is but it is set to "using dhcp" under the tcp/icp menu in the configure ipv4 section and configure ipv6 is off.

sometimes if i turn airport off for a few minutes and then on again the internet will work, sometimes if i don't turn it off it will work after a few minutes...???

oh by the way, the pc i use that is also on wireless doesn't have this problem.

any help would be great!

 

[the_New_guy]

HI,
If your DSL modem is plugged into the normal ports behide the router then DHCP will not work, U have turn it off and enter the IP's you got with your connection.

 

[teeks29]

i have this same problem, could you be a little more specific on how to solve it? my network preferences also go crazy each time I open it saying the settings have been changed by another program. Is there any way to reset it?