Only one works

Hi, this is the code I have on frame 1:

 
initPos = 355;
for (i=0;i<15;i++) {
		mc = scen.duplicateMovieClip("scen"+i, i);
		mc._x = initPos + (mc._width)*i;
}
for (j=0;j<15;j++) {
		mcb = scen2.duplicateMovieClip("scen2"+j, j);
		mcb._x = initPos + (mcb._width)*j;
} 

So, I’m duplicating two movieclips (scen, and scen2). But only scen2 gets duplicated when I test the movie, I want to duplicate scen and scen2 so why does it only do scen2?
That’s why I thought of using “J” instead of “i” but it obviouly didn’t work.

Any ideas how to fix my problem? Thanks for any help.