Can anyone help me with Wii wired internet connection using wii lan adapter? PLEASE!!!?

I have a wii and i have just bought a wii lan connector as we have wired internet connection (no wireless) I have connected the USB to the wii console and the ethernet connection to the Tel 1 port in the back of the router. We tried to get a connection but it brought up an error saying "Error Code: 51420 - Unable to connect to the internet. Please see the wii operations manual or visit support.nintendo.com for istance" Well we went to the support page for Nintendo and it wasnt very helpful or supportive!!! I have ran a command in command prompt to find out my IP address, subnet mask and default gateway and I have entered these in to the relevant boxes in the internet settings but i still keep getting this error message and i cannot get any connection. I just dont know what else to do or try and i really ned help please. Thanks in advance, Sammy.