Creating an animated GIF with movie

I am trying to animate a small thing. A smiley face which bounces up and down. I have set it all up etc. but when I preview nothing happens. On the right hand side, in the movie docker, it shows the correct frames, (all 6 of them).

In the main window, when I click through the 6 frames, they are all frame 1.  And when I press play, nothing happens (it says processing in the bottom corner, and keeps filling up the bar and starting again (assuming it is playing, but playing the same frame repeatedly?)

Not sure what to do with it? When I saved it, and opened the file, it kind of worked, all though frame one stayed there throughout the animation, the others did appear and do their thing, just behind frame one.

Any tips please?

Thanks!