How do i access my router's ip address?

i have a linksys router. model is BEFSR41, and when i type in 192.168.1.1 into my url in IE, i get a login thing. i tried typing in ID:admin and no pword, the login comes up again. i tried no ID, and pword :admin, still nothing. i tried typing admin into both, and i got to an "authorization" page o.o" help plz?