hello and welcome to just answer
you will need to change the antena option on your menu to cable first see if your remote has a air/cable button and push it once then try reprograming otherwise go into the set up menu and look for that option there
if you still have problems please let me know the model number so I can help you
are you using the original jvc remote?
also look on the front panel for a button or switc that says cable /ant or cable/air
sometimes on the back of the set you will find a switch