Resetting Linksys password?

-I'm trying to set up the internet on the Wii but I don't remember the username and password for my router. The website tells me I need to go to this site and enter the username and password which is usually just "admin" but nothing is working. It says that the way to change the password on the router is to reset it, but I don't want to mess anything up.



Has anyone had a problem like this before and can anyone help me out? Thanks in advance!