I bought all the necessary hardware, and I connected the adapter to the head unit, but still nothing works...

After connecting the auxilary input adapter to the head unit and plugging in the Ipod, I can't find the signal. If i cycle through the controls from "off" "cd" "tuner" I get no "aux" or "CD-2" function. Any ideas? I thought all I had to do was plug everything in, but i guess i was wrong

Thanks in advance!