I own a 2014 base model automatic Kia Soul. When I plug my iphone 6 in with the apple phone cable and try to use my car to change the song, sometimes it doesn't work. When I use Bluetooth, it works just fine. The only reason I use the cord is because the sound is louder and clearer than Bluetooth. I don't know why this happens, and I was just wondering if anyone has had this problem, or knows how to solve it. Help? Please?