Enercon1074

Hi can someone please help me I have a 09 C63 and it has a aux lead with a 30 pin (iPhone 4) in the glovebox I have just bought the apple 30 pin to lighting but I still can't get my music in the screen to change songs . It plays through aux but I can't change songs or charge I take someone eles has had this problem ?sorry I have an iPhone 5