Why do i need conect the apple tv to the micro usb port ?

I RECENTLY BOUGHT AN APPLE TV 3 GENERATION , AND IM TRIYING TO CONFIGURE IT AND ITS IMPOSSIBLE, THE SCREEN ON MY TV ITS ON WITH THE FOLLOWING MESSAGE :" CONNECT THE APPLE TV TO THE MICRO USB PORT " I DONT HAVE A MICRO USB PORT, BECAUSE I USE THE IPHONE 4S AND THAT CABLE DOSENT FIX TO THE NEW APPLE TV . I NEED HELP WITH THIS BEACUSE I WANT TO ENJOY MY APPLE TV ANDO I DONT KNOW HOW CAN I FIX THIS PROBLEM