Chances are your television is still set up for cable. A simple setting needs to be adjusted to enable broadcast tv reception. Turn on your tv and open the on-screen menu. Look for something labeled "Input Select". It might be listed under something like "Tuner Options". Somewhere in there, there should be a switch that will switch the tv from "CATV" (Cable) to "TV" or "BROADCAST" (Ordinary Tuner Mode)

Hope this helps and good luck,
--Matt