Being blind

Probably just not seeing the blindingly obvious here. Chucking up an error on the loadMovie line, whenever I add in the “+i” bit to load up each image. Anyone see what the problem is here? [AS]index=10;
for (i=2; i<8; i=i+1) {
thumbnail.duplicateMovieClip(“tn_” +i, i);
this[“tn_”+i].x = index;
this["tn
"+i].y = 50;
this["tn
"+i].loadMovie(“thumbs/tn_gallery_”+i".jpg", 0);
index=index+60
}

stop();[/AS]