Need Help, Configuring Asus N66U with BSNL ONT


can some one guide me in setting up wifi with Ausus N66U on BSNL FTTH please
in the configuration step, I set the connection type to ppope and give in the user name / pass word, after the i get a error "Detecting the Internet connection type timed out. Do you want to try again ?"

Not sure if i am configuration it properly.
NOTE : this is my first time with any router.