First person shooter quick question

I’m making a flash game (a first person shooter game)

For the Flash I have a cross hair as the cursor so that it looks like a sniper scope. I’m trying to get a code so that when you click, the crosshair (cursor) changers color.

So far, my actionscript for the crosshair cursor is:

onClipEvent (load){

startDrag(this, true);
Mouse.hide();

}

onClipEvent(mouseDown){
this.gotoAndPlay(“shoot”);

}

Changing the cursor to a crosshair works, but when I click the cursor doesn’t change color (I have the cursor changing color on another frame in the cursor’s movieclip, and have a stop action on the first frame.) How can I fix it?