Kenwood receiver/cd changer compatibility..

ok i have a kenwood 5028 cd/mp3/wma receiver and i just recently bought a kenwood cd changer off of ebay (used and kind of old). so yesterday i went to hook it up, there is a port to plug in the plug, i plugged it in to the receiver and plugged up the cd changer. everything is seeming to work right…i switch over to the cd changer…it reads “DISC CH” like it recognizes it, then it reads “AUX EXT”, then nothing. does anyone have a remedy for this problem??

thanks in advance

It means an unsupported disc changer is connected. CD changers manufactured afer 1998 can be connected to your head unit.

ill be a bitch thanks man