Stop continuing music (Please Help)

Hello! I’m making a main menu and wanted continuous music running through each menu scene. The script does what I want. But when I load mission #1… the music is still playing and wont stop. Please Help.

Script:

#pragma strict

static var currentScore : int = 0;

var offsetY : float = 40;
var sizeX : float = 100;
var sizeY : float = 40;

var musicPrefab : Transform;

function Start () {
currentScore = 0;

if (!GameObject.FindGameObjectWithTag("MM")) {
	var mManager = Instantiate (musicPrefab, transform.position, Quaternion.identity);
	mManager.name = musicPrefab.name;
	DontDestroyOnLoad (mManager);
}

}

Try like this:

// Identify your scene where you have to stop current running music and probably start new one
if(Application.loadedLevelName == "GameScene")
{
    // Find the game object who is playing the audio and STOP audio clip.
    GameObject.FindGameObjectWithTag("MM").GetComponent<AudioSource>().Stop();
}

Hope it helps!