Help needed with xna/c# error

Hey making a game in xna for a project. Im implementing music at the minute.

Basically I have a title screen no music once the player hit starts the game the music plays no problem. I have 3 lives and at first my music played continuously even if i died so i put in music.Stop(AudioStopOptions.AsAuthored); if my if statement when my lives are gone.

When i die it send me back to the title screen but for somereason it throws up an error when i start the game again saying InvalidOperationException

so even though the music.play works at the beginning when i die and am thrown back to the title screen it doesnt??

protected void StartNewGame()
{
_GameStarted = 1;
_LivesLeft = 3;
player.ScrollRate = 0;
_playerScore = 0;
_GameWave = 0;
music.Play();


StartNewWave();
}

theres my startnewgamemethod that picks out the music.play as an error ONLY when i loose my 3 lives.

if (_LivesLeft > 0)
{
PlayerKilled();

StartNewWave();
}
else
{
music.Stop(AudioStopOptions.AsAuthored);
_GameStarted = 0;
_ProcessEvents = 1;
}

thats where i stop the music playing if i die.

Can anyone help??