Audio files need to be .cda files to be played in most stereo CD players. The computer, however, will read and play lots of different media types such as .wav, .mp3, .rm etc If your problem CD contains .cda files then you are in trouble as it may be that your stereo CD doesn't recognise burnt CDs. The most likely case is that the problem CD contains .mp3 or .wav files and these have to be converted to .cda files. This is done by copying the files to your hard drive then using Nero to create a *music* CD. Point the Nero wizard at the file you want then wait while the Nero does the rest.