Transparent PNG problem

Hi all…

I am having an issue wherein I have imported several transparent PNGS in 24-bit format and transparent backgrounds into flash.

On the stage, the transparency looks perfect, yet when I preview or export the movie, the pngs get some strange outlines around them in weird colours.

WHat is going on here??
plz help
-Karmakat
AKA ALeksandr Berland