Info 2 [Q] connecting to WiFi with only wps button authentication.is it possible?

hi I am using Samsung galaxy s duos gt-s7562.I recently tried connected to a WiFi whose password is not known to me.router was easily accessible and wps button was available..I checked "show advanced options" on my phone and selected wps button as a way of authentication.then a screen popped up showing press wps button on router within 2 minutes.I did so and was connected to that router.status appears as connected.signal strength is very high but still I'm not able to open any page on my phone.it randomly sends some bytes n no page opens up.
what is the reason for this?? is password also required for connection or only wps button is sufficient?? please help....!!