Export as Animated Gif Help

Hey all,

i’m exporting my swf movie as a animated gif and for some reason its coming out looking like its being run on a 256 colour machine whats the reason for this?? and does anyone know how to have a animated gif as such or would i need to just keep it as a swf to keep it clear and not all pixalated and weird??

Cheers all in advance!
ps i’m using flash 8