[Elidan]

j=1
while (++j <= 5) {
	duplicateMovieClip(skill1, "skill"+(j+1), j);
	_root["skill"+(j+1)]._x = 38*j+skill1._x;
	_root["skill"+(j+1)]._y = fixY;
}

а лучше так:

for(j = 1; j <= 5; j++){
	duplicateMovieClip(skill1, "skill"+(j+1), j);
	_root["skill"+(j+1)]._x = 38*j+skill1._x;
	_root["skill"+(j+1)]._y = fixY;
}