rating has had some changes with the recent updates to iTunes, appleTV and the remote app.
It is important to know what versions of these things you are running in order to answer your question accurately.
Things are different in the latest stuff.
The new remote app controlling the new up next feature only allows ratting changes from ipads.... no iphones or touches. Old app still supports rating and still can display album list of current song but much of its management function are disfuntional with the new 'improvements'
hope that helps.