flash - Error #2025 AS3 -

i'm trying build game chicken invaders , eror :

argumenterror: error #2025: supplied displayobject must child of caller. @ flash.display::displayobjectcontainer/removechild() @ superstudent7_fla::maintimeline/movebullet()

this problem occurs when space ship shoots.

to solve , need know 2 things:

1. my bullets defined movieclips ,and not on stage.. brought them stage this:

   function shooting(e:event):void {  var bullet:bullets = new bullets();  // bullets class name of movieclip   ...   ...   ...   addchild(bullet);   bullet.addeventlistener(event.enter_frame,movebullet); }//end of shooting 

i need know if ok add bullet stage this? or there way?

2. here code makes bullet move:

   function movebullet(e:event):void {   e.target.y -=10;    for(var i=0;i<enemy.numchildren;i++) {                 if(e.target.hittestobject(enemy.getchildat(i))) {       counthits[i]=counthits[i]+1;                     e.target.removeeventlistener(event.enter_frame,movebullet);       removechild(movieclip(e.target)); //here problem      ...                      ....      ....            }//end if   }//end   ......       ..... }//end of movebullet 

enemy- container of enemies (movieclips)

it seems class has movebullet function not same container of enemies, you're removing movieclip not child of container, error message explains. this:

if(movieclip(e.target).parent) {       movieclip(e.target).parent.removechild(movieclip(e.target)); } 

that removes target of event whatever parent added to. , doesn't remove if it's not added display list anywhere, don't other errors.

alternatively, since state enemy container, this:

enemy.removechild(movieclip(e.target));