The purchase of the Terrain Awareness features uses the In-app purchase feature from iOS. You have to be online to make the purchase. You enter your Apple ID and password and it charges your account $9.99 for the features.
Then you have to have a Maps Made Easy account to get the token (basically a password to prevent abuse) and put that in the Maps Made Easy settings menu.
If it isn't operating like that there may be an internet connectivity issue.