yahoodsl

Hi all When I tried and set up my mother's yahoosbc dsl, not knowing what I was doing I tried to do it with dhcp and my have set it in a loop for now she can not got to Yahoo.com or anywhere on Yahoo. Even when I got there dns numbers and entered them got there but then non of the links on the site work. Even when I do a google search and find Yahoo there all links fail with cannot find Yahoo. Thanks Robert