how to hit a test

I want to manipulate an MC in the main level by an MC that is within another MC in the main level Demo_button.onRelease = function() doesnt work, when i release the demo_button nothing happens Thats inside a 2nd level MC. however the function works great with preview.onRelease, inside the level 0 AS Var hit = demo_button.hitTest(_level0._xmouse, _level0._ymouse); Can i do that for a hit test?

If(demo_button.hitTest(_level0._xmouse, _level0._ymouse, true)){//actions}