iPad won't connect to my Linksys router

I have a Linksys WRT160N router at home but my iPad can't connect to the network. It can see the network but won't use it for anything.I went to settings for the network on my iPad, but the fields like IP address, DNS server, etc are all blank.On the router, I turned on DHCP, reset it. On the iPhone, I forgot the network and reconnect. The problem still remained.There is an issue with an older