Find bug in flash- javascript layer player control app.

I have a flash app that puts a player control in a separate layer that scrolls down a web page as an audiofile is being played. Recently for some unknown reason, the player image has become truncated - the truncation begins after the player begins to move on the initial time point. I need someone to debug this to find out why the entire player layer is not being shown. This involves fairly complex javascript and layers. I don't think that the flash app has anything to do with it. The functionality is fine.