duplicateMovieClip

1

Hey,
i have a question about AS2 duplicateMovieClip
the problem is… when another movieclip is duplicated after 2 seconds then the last movieclip which was duplicated dont play to the end but stops before the movieclip end
i hope you will get the idea.

 
function uusVastane() {
 dupMovie();
}
var enemyUus;
enemyUus = setInterval(uusVastane, 2000);
dupMovie = function () {
 plah.duplicateMovieClip("plah"+i,i,{_x:_root.ball._x, _y:_root.ball._y});
};