pioneer deh-p9400mp ip bus problems

[midz16v]

I have a pioneer deh-p9400 mp head unit,it has no aux in to listen to an mp3 player,so i bought an rb10 ipbus phono lead plus another phono lead that goes from this to a 3.5mm headphone jack which goes to my zen touch mp3 player.
The problem is i cant get the head unit to go to the aux so i get playback.
What am i doing wrong?
This is the headunit
http://www.pioneer.co.uk/uk/products/archive/DEH-P9400MP/index.html
this is the cable i got
http://www.1topstore.com/product_info.php?language=en&currency=GBP&products_id=11252
And the other cable
http://www.ktduk.com/product/2_x_rca_phono_to_3_5mm_jack_aux_for_ipod_mp3/

[troublestarter]

i believe you need to get into the set up menu and switch the changer input to aux

[midz16v]

i believe you need to get into the set up menu and switch the changer input to aux

well i finaly got into the menu and did what you said and hey presto its all working.
cheers for that mate