StartDrag issues, PLS help

I have an icon that when pressed displays a msg.
BUT why when i decide to StartDrag that same movie clip, the icon seems to be disabled or not working?

My movie clips
mc_all
inside of mc_all i have mc_icon_1

heres the code:


_root.mc_all.onPress = function()
{

	startDrag(_root.mc_all);
};
_root.mc_all.onRelease = function()
{
	stopDrag();
};

_root.mc_all.mc_icon_1.onRollOver = function()
{

	trace("Hello");
};