I have a Sony head unit and it the antenna goes up only when the radio is on, not during CD play. One option you can check is to make sure you run the proper wire to the power antenna hook-up on the CD unit, some have two blue wires, one for power antenna, and one for power remote (for turning on amps and such) which if is hooked up to antenna will make it go up when the head unit is on in CD & radio.