While coding Acion script try to specify targets precisely. This also refers to getNextHighestDepth(), otherwise it may not work. Dont waste you time :-)
Macromedia help suggests -
this.attachMovie("circle", "circle1_mc",
this.getNextHighestDepth()); - just
don't be stupid and use something like -
StarMap.attachMovie("star", "star"+ starId,
StarMap.getNextHighestDepth());