Snow thing

Im using the snow .fla from the site tutorials in Flash MX and im trying to incorperate into part of a sig for a message board so I add my text and such. As a .swf its just like I want it, but when I save it as an animated gif it doesnt “snow” and the colours are messed. Is there a way to make the gif just like the swf?

I attached the swf that I want to be exactly like the gif.