Best way of adding background sound

i would like to add background music to my flash website, but i have tried many ways of doing so. currently what i have is one movie clip which consists of two frames - one has the play icon and the other with a pause icon and the sound file. however, after some time and also a few button clicks, the sound repeats and results in the sound playing over the previous sound. is there a way of fixing this, or an alternative way that works without any glitches?