MacBook Pro not connecting to the internet

My Macbook Pro running on Mac OS X Lion 10.7.5 (11G63) says i have full connection to my wifi but anytime I try to open a web page it says I am not connected to the internet. I connect to my router wirelessly. I have tried running test and the MacBook says I should have full connection to the network and internet. I have a iPhone and a HP laptop working fine with the same router but my wifi doesn't seem to work at all on my MacBook, HELP!!!