See also:

Disc Errors
If the DVD player is unable to read the disc, a Disc Error message is displayed on the VES™ and Radio displays and the disc is automatically ejected.Adirty, damaged, or incompatible disc form ...

Supported Media (Disc Types)
The MP3 file recording media supported by the radio are CDDA, CD-R, CD-RW, MP3, and CDDA+MP3. ...

Playback of MP3/WMA Files
When a medium containing MP3/WMA data is loaded, the radio checks all files on the medium. If the medium contains a lot of folders or files, the radio will take more time to start playing the MP ...