2008 F350 "AUX" port
 

We recently purchased a 2008 F350 and we tried to play our iPod using the factory auxiliary port jack. We press the "AUX" button on the radio but it just cycles through the "SAT 1, SAT 2 and SAT 3" inputs. It never shows the "AUX" input option. The truck has the factory 6 disc with sat and the auxiliary port jack on the dash. Our 2008 F150 had the same auxiliary port and we used it all the time with no problem.

Am I missing something? I tried to find a setting that maybe turns options on and off but was not successful.

Please advise. Thank you in advance!!