I can not access my WD cloud when I am away from home (myhome network.
Did you enable remote access?
Here is the manual http://support.wd.com/product/install.asp?groupid=904&lang=en
Also, when you installed wd software it should have installed a desktop short cut to learning Center which can answer your questions. If you need further help setting it many here will gladly help.
What device are you using to try and connect with? Are you trying to connect using wd2go.com or the My Cloud app?
I am using Apple computers and tablets and can not access my cloud. I use WDmycloud app