why do you need to use the HTML?

i can't help there, but usually i use an external swf which is exported with the SoundClass inside at and all the sounds needed, then from the Main swf:

load sounds.swf into soundClip

play sound like:

soundClip.soundUtility.playSound("sound")

or reference the function which is faster

_global.playSound = soundClip.soundUtility.playSound