Eclipse Android programming new folders don't add in the code

Question

im trying to add music to my app here is the code

super.onCreate(Heshamlovethecold);
    setContentView(R.layout.splash);
    ourSong = MediaPlayer.create(Splash.this, R.raw.skult);
    ourSong.start();

skult is the mp3 sound and the raw is the folder and the error is at the raw folder the fix till me to add raw class and when i do it go to the R.java and then the skult file give error

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