Why doesn't IP Adress, DNS, etc., show up on my ipod touch for my network w

Question

got my ipod touch a week ago. i have yet to be able to connect to internet. been to the airport twice in the last week. FULLLL wi-fi signal, still get that dang message saying it's not connected to the internet blah blah blah.
so now i'm trying to connect to my home network. (that 2wire thing).
it's the only network my ipod picks up and i know it's mine.
sometimes the password workes, sometimes it doesn't.
yesterday it sorta worked for a while. (i reset my router and had to set everything up again) but it would just say the server isn't responding.
just now, i made sure to set the passwrd as the default and everything.
and it says 'cannot join network.' or something like that, i forgot.
MAIN THING:
i noticed that when i click the blue arrow my network, all the info is blank, like the ip adress, dns, all that. yesterday when it seemed like it wuz attempting to work, for a little while, the ip adress,etc, showed up. not now. why's this?
please and thank yooou![:
P.S: yes i've tried everything that's suggested, restarting, forgetting netwrk, renewing lease,resetting settings, all that, many times.

Answer 1

Regarding "public" wifi spots, like perhaps your airport, it may not be enough to choose that wifi point in Settings|Wi-Fi. or let the iPod choose it for you. (You'll get a signal to these, but that's not enough.)
You may have to open Safari and try to access a site. At that point, the wifi provider will jump you to a login page where you either press an acknowledge button or have to provide other information. Once that's done, you are connected and can browse or use other apps that connect to the web. One warning, some spots (like my local mall) will block some ports, like email.
For your local router, my blue arrow gives a page with ip, subnet mask, router, and other info filled in. What kind of router are you using and what type of security?