What does code 23 mean from player?
It means, you need new player or a player update.

Why does player stop and buffer at times?
Too many are trying to play the same song at once which interrupts server streaming the song you are playing.

Notice: Free Real player is in small print in top right hand corner of company's page below and you have to look for it.

To play, or hear songs in the way they should be heard, a player should be newest Real Audio player that'll play both MP3, and Real Audio. Get players free, by clicking on the link that is above. Outdated players may not play the songs.