I'll try to tell you how I found the routers DHCP server. I open command and enter 'ipconfig /all' and it will show a long list of your current connections. In your wireless connection it should have something that says DHCP and to the right is the address, only got one address in my case. That's the address I use for my DNS server setting.
If the address you found isn't working, try the method I mentioned! Good luck. 