Can't connect to wifi

Oct 25, 2013
I have just taken delivery of a Mi2S which a friend brought from China, yes, it is genuine. I am completely new to smartphones so simple stuff please. I can see the network at work, and have entered the password correctly as verified by the IT manager, but it doesn't connect. All I get is the dreaded X even though the network is showing with excellent reception in the WLan manager. Any suggestions would be gratefully received. Thanks