I had a go at what you were trying to achieve and came up with this code that seemed to work…
onClipEvent (enterFrame) {
if ((Key.isDown(Key.SHIFT)) and (Key.isDown (Key.LEFT))) {
this.gotoAndStop(“running_left”);
} else if ((Key.isDown(Key.SHIFT)) and (Key.isDown(Key.RIGHT))) {
this.gotoAndStop(“running_right”);
}
}
You put that code on the actaul moveclip that i assume you are trying to animate (-: