attachMovie prolem

Hi…

Okay …I really need u guys to check this simple code…because is suppose to attach the amount of “mc” based on how many click to this button…currently it trace “_level0.paper.mcundefined” and when i click again it also trace**"_level0.paper.mcundefined"**…so hope someone will correct me…/explain to me…any help really appreciate…



createEmptyMovieClip("paper", 1);
btn.onPress = function() {
    clip = paper.attachMovie("mc", "mc"+i, i);
    trace(clip);
    clip._x = 250;
    clip._y = 200;
    i++;
};


tq…