i installed the DVD player on the 318i finally! (its a 98) but im having a few problems..after installing everything, hiding it and all i came to a problem. all the wires are hooked up correctly i know that, because ive installed stereos like 1000 times before. but im not getting ANY sound. none of the speakers are working and i mean NONE. im sure its because of the harman kardon system that i have installed, and since its a beamer things are always difficult. any help is greatly appreciated. thanks alot!