I wish to get rid of my apple remote control and use my iPhone to control my apple TV. I have downloaded the remote app, however I can't find a way to use this remote to control the playing of movies on the Apple TV.

The app allows me to control what happens on the iMac but not the TV.

I wish to control the apple TV even with the iMac is off.

I have the last generation HDD type Apple TV, this be the reason.

Thanks