I have a trunk mounted stock changer in my 740i that is acting weird. For example, when all 6 trays are loaded, it would not recognize #4 and 5. When 1-4 are loaded, I lose #3. When 1-3 are loaded, I lose #4. There's no pixels lit for them and nothing happens when I push the button to select them when they're unlit. Anyone experience this? Is the changer wacked? Thanks.