kdezines

I have an AVIC n4 with an ipod classic. I plug in my ipod to my n4 and the ipod and stereo immediately pauses. The ipod says paused as well as the small screen on the stereo next to the volume knob. The controls on the ipod and on the touch screen are inoperable. The buttons on the touch screen indicates it is being pressed but does not do anything. What is causing this...please help. Thanks Keith