startDrag works on some clips but not others?

I’m trying to do a simple mouse pointer change so that when one button is pressed, the pointer changes to an ‘X’. I have loaded the image into a new clip and it displays in the movie, but when I try to use startDrag, i get no movement. but if I substitute any of my other clips in the startDrag statement, it works perfectly.

all clips are constructed in the same scope, same frame, and are seemingly identical except the one frame i want to move has the image loaded (via loadMovie.)

Any ideas?