controlling movieClips using other movieClips

[FlashDevSD]

Looks like your migrating from AS 2.0. Make sure both clips are on the main timeline and have instance names (example mc01 & mc02)

mc01.addEventListener(MouseEvent.MOUSE_OVER , controlClip)

function controlClip(e:MouseEvent):void
{
   mc01.gotoAndPlay(1);
   mc02.gotoAndStop(9); // you can call a function on mc02 if you want
   textEffect(7); //or call a function that will alter mc02
}