Play/Pause flash TimeLine from main movie clip

Hi,
I have many swf called in main movie clip by adding keyframe at last frame of every movie with this code
loadMovie(“tour/1.swf”, 1);
loadMovie(“tour/2.swf”, 1); etc.
every swf timeline is placed in Movie Clip (MC)

i have play and pause button in my main movie clip where the other swf are called or run one after one.

i tried this code but does not work

on Button Pause:

on (press) {
MC.stop();
}

on Button Play:

on (press) {
MC.play();
}

i also tried,
_root.MC.stop(); etc. on button but does not work…
is there any one to help plz.