Loading Jpg, with variables

Okay, trying to make this load certain jpg files based on a variable, but I can’t make it loop through?

[AS]
artistName = “Grace Jones”;

for(i=1; i<4; i++){
filename = artistName+"/"+i+".jpg";
trace(filename);
loadMovie(""+artistName+"/2.jpg", root.images); //this works
loadMovie(""+filename+"", images.holder
+i); //this does not
trace(artistName+"/2.jpg");
}
[/AS]

any ideas?