Pioneer DDJ-SR2

Hi,

I'm trying to connect an iPod as an external Deck to the back of the DDJ-SR2 using the RCA Connections (Line in). The micro switch on the back of the unit is set to Line, The Deck switch on the top (left side deck) is set to Line/Phone, the Master audio level is set to midway, and the left channel level is set to midway also. The Controller is connected to a Macbook Pro 15",using a USB Cable, running Virtual DJ 8. All controls are running perfectly on VDJ8 software.  I have no audio output? 

Thank you for your help.