N450 Wifi Set Up Issues

I just bought this router (N450 Cable modem Router) and after log into the router I am not seeing any Wifi settings. Any suggestions on why I cannot set or even turn on my wifi. There is a button on the front of the router and I have pushed it and pressed it for 10 -15 seconds with the wifi not turning on. I am guess it is in the setting somewhere. Any help would be great. Thank you.