Scrolling image bar help please...?

Hi

I’m trying to make an imagebar and it works fine until the window is resized (stage resized) when it screws up. If anyone could have a look at the AS3 code and suggest how I can get it to resize correctly I’d be very grateful.

http://rapidshare.com/files/149060974/tickertest2.fla.html

TIA

Adri