First of all sorry for my english is very bad

I have a truble, when i try to read any kind of mp3 cd on my car radio (an original mp3/WMA honda fit second series) i try to explain better:

With car radio off i put my cd in and in same chase start to play cd and i can navigate on it skip track skip folder etc... If i pass in Radio mode and then return in CD mode the car radio start to read CD and then slpit the CD out and write "Bad Disk see owners manual"

thanks for help