hello all im a new member :=)

i wanted to ask help. im new in remote exploiting and so and i wanna make some tests with softwares and so. actually i would like to hack my osbridge router password (i know it already) with brutus (using either dictionary or bruteforce. when i start the software however it gives me this error on the output : too many consecutive auth sequence errors whilst recieving password prompt assuming user is invalid

how i have to configure brutus ? he find two users but no password . and actually i have set the router to defaults passwords !
i u se telnet attack with bruteforce.. please help me gimme some hints ... the output of my router should be : admin for user name and pubblic for password ! but instead i get only
admin aaa
guest aaa

bye all and thanks in advance