CodingForums.com - MP3 Player, multiple functions per button, help needed

Hi everyone, this is my first post and my first time working with actionscript. I'm developing a website for my own business and am integrating an mp3 player. I can have it play one song easily and I can have it go to the next song as well, however I can't pause and then re-play the second song because the button is linked to the first song. Here's what I have:

Code:

var music:Sound = new Sound(new URLRequest("http..."));

var sc:SoundChannel = null;

var isPlaying:Boolean = false;

var pos:Number =0;

var soundVolume:Number = 1;



play_btn.buttonMode = true;

pause_btn.buttonMode = true;



play_btn.addEventListener(MouseEvent.CLICK, playMusic);

pause_btn.addEventListener(MouseEvent.CLICK, pauseMusic);



function playMusic(e:Event):void

{

                        sc=music.play(pos);

                        isPlaying=true;                

                        dyn_txt.text="song1";

                }

                

                

function pauseMusic(evt:MouseEvent)

{

        pos = sc.position;

                        sc.stop();

                        isPlaying=false;

                        dyn_txt.text="song1";

                        soundVolume = 75;                        

                }



var black:Sound = new Sound(new URLRequest("http..."));

var sc2:SoundChannel = null;

var isPlaying2:Boolean = false;

var pos2:Number =0;

var soundVoulmer2:Number = 1;



next_btn.buttonMode = true;



next_btn.addEventListener(MouseEvent.CLICK, nextBlack);



function nextBlack(e:Event):void

{

        sc.stop();

        sc2=black.play(pos);

        isPlaying2=true;

        dyn_txt.text="song2";

}

Any ideas?