Connected but no access

My laptop says that I am connected but when I tried Mozilla Fox I just couldn't access to the WiFi facility of Lolita's Loft. I said to myself "oh, I must be somewhere lost around the corner." But good thing our IT was not sleeping yet, we have to befriend with the front desk clerk so he can do something for us, not just me so we can access to the internet. At first we thought it must have been the service provider but later when our IT started his hands on the server and on the router and on the ports we were relieved.