I recently purchased a 2004 Exp EB and it has the navigation system, 6 cd dj radio and the dvd flip screen. I believe they're both factory setting. The vehicle did not come with the infrared headphones, so I just purchased a universal brand through Amazon so have yet to receive them. My issue is the sound does not play through the radio speakers. Is there any way to get the sound through the radio for the times the entire family wants to listen to the movie? I've tried the cd button to switch from CD to CD DJ, however it does not have a DVD option. I've also tried pressing the 2 and 4 buttons to switch the dual play and does not work either..please help!!!