Need help on a (simple) sound/video problem (As3)

Hi People, after being away from Flash for 10yr. i tried making a simple music thingie but ran into a problem:

so i basically structured it brutally old school with time/frame animation and embedded media.

so: i have 3 frames (with buttons jumping to the sprcific frames)
each frame has embedded Video or Audio (playting on "event x1"

so what i thought i could do was having the button go to frame 17 and play sound
then add a "SoundMixer.stopAll();" at frame 32 to stop the "old" sound from playing
when the next button is called to go to frame 33 and play a new sound.

stupid simple and seemed as the "easiest" (for a newbee) way to do it without

getting into too much actualy code.

Problem remaining: after the SoundMixer.stopAll();
nothing will play (no sound)
so i need to find a way to allow sound to play again, like:
SoundMixer.ok to play whatever sound again();

and yes i know this is a stupid as it gets, no clever and there are 1000 better wats to do it
but i am afraid it is over my head

Ideas?