Wifi Issues - Help Please!

Hello,
I am trying to access free public wifi with my Ipod Touch and I am having a hell of a time. My Touch can see the network and connect to it but when I try to use Saffari it says "Safari Can't Open this page because it can't find the server" on every website.
I was having this problem at home too until I set up my ipod touch to use a static IP and added the router ip, DNS and other fields. I am currently using the DHCP setting to configure it for the public wifi. If I knew the router ip and how the public wifi is set up I prob could set up a static Ip and have it work but I am sure the Ipod Touch is post to be able to connect to without such a hassle, my laptop can.

Is my unit defective or am I missing something. Someone please help!

Edit: Also when I press renew lease the router and the DNS don't show up, not even for my home wifi network when I have it set to open access.

 

I know my home network works, and when I configured it to be open access just to test out my touch I still got the problem, it would not auto fetch Router ip and other info needed to connect. It didn't work again until I manually set up the network with a static IP.

Also when I went to the apple store I noticed none of their touches were hooked up to the internet, when I asked why they told me they were having trouble with the network, I can only assume they were having the same kind of trouble I am having now.

 

No one else has this problem? I just got back home and tried to connect to my wifi without using a static ip just using DHCP, I have a linksys router, and it connects but I still get that can't find server message, after this I try to renew the lease but the ip it is using is incorrect and it doesn't fetch DNS or router info.

I have a password on my router using WEP but I already entered it and it connects fine, why would it only work if I manually set it up using a Static ip?

 

Now I can only get it to work when I set it to open access... weird, will connect with WEP enable but wifi bars don't appear on the top and i cant go on the internet