i downloaded the new maps and burned them to a tdk d/l dvd using imageburn. burn was successful according to the program and when i entered the dvd with the 08 west maps, my screen tells me to insert appropriate disc. im unsure of what i could be doing wrong, but does anyone else have this issue using the AVIC-90DVD navi unit

 

btw i bought the unit used assuming i have all the needed software. the map disk i am using is the 03 maps which are way outdated