Why isnt this masking properly

http://adamgee.ca/main.fla

so im trying to make this little square effect where they all blow away to the sides.
'I have many little squares, and identical little squares masking on top. So i can animate the mask so that i can do the effect.
but right now the mask is only masking te first little square, all of the squares that are masking should be visible.
someone check it ?