Music loop

[font=Arial]I have ‘Sound On’ and ‘Sound Off’ buttons on mutiple scenes and I am playing the music loop in my flash movie by loading an external swf. When I move to the next scene the sound reloads which I do not want. How do I use an if-statement that checks whether or not the music.swf, that needs to be loaded is found and when it is found, go to a frame?[/font]