Ok so here's the deal. I have a 2004 X5 3.0i using the v23 OS for my DVD nav system. I want to update to a more recent Operating System and I'm not having any luck and getting very frustrated. I've done everything that has been said on other threads. I've even tried uploading the v26, v27 and v28 OS's but everytime i insert the CD that i've burned into the Nav dvd player it refuses to recognize that there is a CD in there. has this happened to anybody else?..... any tips or suggestions would greatly help.