Iphone 4 not being recognized with the extension cable

My Iphone 4 is not being recognized with the Apple extension cable in my new Nissan Juke so the phone has to be kept in the glovebox due to the very short cable Nissan provides. This is frustrating since the phone gets noticeably worse reception in the glovebox. Does anyone know of a fix for this so I can run a longer cable extension and run the phone out of the glovebox? Mabye a different extension cable or longer cable that works with Nissan's set up?