Buttons inside a MC

Hello,

I have a movieclip and some sort of buttons inside of it for interaction.
The Movieclip is in the _root and all other stuff inside of it.
Now problem is:
Whenever I attach an action to he MC like:


this.onEnterFrame = function() {
 
_root.mc_stage.onPress = function() { 
 startDrag(_root.mc_stage,false);
}
_root.mc_stage.onRelease = function() {
 stopDrag();
}
}

and run the swf, I can NOT interact with the buttons. I cant clikc them.
When there is no action applied to MC on the instance or the timeline the buttons work perfect.

How can I make both work ? Drag the Movieclip with mouse and also make buttons work.
thanks.