marketplace says unable to connect

downloaded latest version of minecraft on ipad. Now I cant access the marketplace. I receive message as follows..."we're unable to connect to the marketplace, maybe check your internet connection". Internet connection is fine.  I have two ipads. one for each of my kids. one ipad the market place is working fine, one it is not.  I even deleted the app (offloaded) reinstalled. same issue cant access market place. Please help.