I updated my Iphone last night to the latest version of software 7.1???

I updated my Iphone last night to the latest version of software 7.1??? I cannot connect to my home wifi. It recognizes it's presence but keeps telling me i am unable to join. any clues???

when I look at the information of my Iphone about the home WIFI all the information is blank. Its only picking up the name of the wifi.