Hey guys i have aDouble Din in-dash DVD player in my car but i don't know how to connect my ipod to it. It's model is AVH-P4050DVD
http://www.pioneer.com.au/Products/Car%20Entertainment/Visual%20Audio/AVH%20P4050DVD.aspx
theres a usb connector, but when i used my ipod - computer usb it recognises as USB (not ipod) but can't play anything. is there something i have to buy or something? pls help ty