Image edge smoothing in flash?

Hi there, I have a gif image of a bottle with a transparent background. In flash I need to place it over a coloured background. Now with smoothing on in Photoshop, the shape of the bottle is nice, but a thin white aura can be seen in flash (the blur area which smoothens the edge). If I remove the smoothing, the aura is gone (no blur) but the edge is all jaggedy. Is there a way to smoothen an image’s border in flash, so as to blend the edges better with the background? I could colour the background in Photoshop, but that’s not an option - I need it to be without a background (f.e. in some instances I will have to place the image over 2 bars of a different colour). Any info much appreciated!