Try this
File -> Export -> Export Movie - select png sequence as the save as type. (Save in a new folder on your desktop or something, as all the frames will save individually)
With fireworks its File-> Open + then select ALL the images and make sure open as animation is selected before clicking on open.
Then File -> Image Preview, then select Animated Gif from the Format drop down menu, then click on Export - give it a name and save it ( Make sure Images Only is selected in the Export menu ).
Any problems give me a shout, I should be on here for the rest of the night