i have a 99 audi a4 with the audi concert system and 6disc changer. the 6 disc changer didnt work so i replaced it and when i installed it, i pressed the eject button to get the magazine out and nothing happened. so i go to the front of the car and now the whole system doesnt work, turning it on and off with the center knob does nothing, and the lights arent coming on. i checked all the fuses on the driver side panel and all of them were good. dunno what happened.. help!

changed the fuse in the back and now it powers on but the 6disc changer gives me CD1 ERR1 error which means the disc is dirty but its a brand new CD. any ideas?

CD2 - CD6 works, right? how if use another CD music on CD1? still error?