wireless - How do I connect to a WiFi network using nmcli?

I am able to connect to a wireless network using nm-applet when running it in lightdm, however, it does not work in an openBox session that I start as myself (a user started X Session), but am not able to do so using nmcli.

I am running nmcli using sudo. After 90 seconds, I get a time out message. What could be wrong?

This is the configuration I must use - http://www.depts.ttu.edu/ithelpcentral/solutions/wireless/