Pioneer z120bt, wont play ipod

[Bkzxclusive]

So i purchased a pioneer z120bt and everything wrks perfectly fine except for my iphone 4 which what i usually use for music. The manual says AV1 input should be on IPOD so thats what i did. The radio reads it and shows the song thats playin but theres no sound. I cant seem to figure out the problem with this. The plug coming out the radio has a USB input together with a headphone jack input, the headphone input wrks when i plug it in with AV1 on IPOD but the usb doesnt. Anybody have any ideas?

[adas]

did you get the pioneer ipod hook up cable? You can't use Ipod controls, nor listen through the Aux USB port. only other mp3 players. go figure

[Bkzxclusive]

O hell no....lol such an expensive radio and i gotta buy extra shyt.