Why does my loaded jpg disappear after the mask reveals it? Argh!

https://filebox.vt.edu/~gyanez/flash_test/source/

site on https://filebox.vt.edu/~gyanez/flash_test/

after the mask swipes left to right to reveal the externally loaded jpg, the jpeg disappears and never returns. What am I doing wrong here? I have stop() actions, no extra keyframes that I can see. Please help a newbie.