attachmovie problem

i have this actionscript:
on(press){
i=1
mc = attachMovie("ketchupsplatter","ketchupsplatter"+i,i)
i++
mc._x = _xmouse;
mc._y = _ymouse;
mc._rotation = random(360);
}

its on a movie clip that i want the splatter to appear on only. my problem is that whenever i click on it again to put more splatter on it, the previous one disappears. what can i do or add to this script to make it so that it just adds more splatter?

thanks