Wi-fi not working on phone and touch

i have a touch and phone both on 2.0 wifi was working fine till last night..i have restored just the iphone and restored it fresh(not backup) and still wifi not working but both will connect to other wifi's in my neighborhood..i have a netgear WGR614 V6 router..and i doubt it is the router because i have a laptop connected to the wifi..does anyone know how to fix this..thanks

I suspect the problem is in the way DHCP works with the iPhone/iPod Touch. A simple workaround for me was to assign an IP address manually to the iPhone outside of the range of the DHCP server on the router. This works well for me for some reason.
Now for a little more information: I use a simple WEP 64-bit key (or 48 bit depending on how you count it) on my router and I connect to many other wireless access points as well (university, friends' homes, etc.). I noticed that the very first time I connect, the DHCP server will give me an address. If that address is wrong, I will be stuck with that address forever and will be unable to change it even if I do that manually. It appears that no amount of resetting and forgetting the network etc. will work. At home, it is an autogenerated address, which of course does not work with the router at all.
The same happened with my University network, but I was able to revalidate the new IP address and have the university router system accept it as a valid IP and so the iPhone now can connect - but the IP address is the same as before. I also noticed that if I put something in the "Client ID" field on the iPhone, that information is not changed even if I erase it manually.
I do not know why this happens and I haven't debugged to the point of sniffing the network. This happened with my father's old iPhone 1.0 as well, but I was able to reset the parameters in his phone. No such luck in mine...

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