XML portfolio w/ progressbar component Q?

I am using the XML portfolio by Kirupa as a base.
I am trying to incorporate the ProgressBar Component to work every time I click on a thumbnail.

The progressbar and Loader components are on the main stage.

I have the ProgressBar on “Polled” and it is targeting the image_mc.
On the first click, everything works fine. after that,
The ProgressBar stays at 100.

I think it might be a problem with the nested on(release).
any help would be appreciated.
here is the FLA file: