You should not be setting any of these numbers. You should be using DHCP to negotiate with the router. The router's IP is likely 192.168.1.1 (not to worry as that's only on your side of the router, not the Internet proper).
Make sure that you don't have MAC address filtering turned on in your router. If you install the router software on one of your computers, all sorts of bad things can happen to keep new devices from being granted full access; especially if your router is a wireless model.
What you can do as a test is type ipconfig /all at a Command Prompt on a Windows machine and see what the DNS server looks like. My guess is that the router isn't doing its DNS duty so you could try adding a known good DNS server into the HR20 parameters and see what happens.
Note that this is only a temporary solution if it works. You still need to figure out how to get the HR20 to fetch its own DNS server addresses from the router.