if you change the username and password its gets a pain when u ring the provider up and they start going into the router if u cant remember the wireless key your better off just resetting the router and putting a new password on
the username and password to get to the router settings is usrename is admin and password is password unless u changed it when u installed it but u should be able to just reset the router with the pin hole at the back hope that helps
i got bt-Infinity option 2 in march and get 34meg download thats a lot better than talktalk at 1.5 meg download we cant get virgin where i am cos the cable never came round here