Help with random colours

Hi all

I have a flash AS2 project - within which a movieclip loads dynamically some falling "snow" - my snow is made up of a movie clip which has a yellow diamond shape

I have added the code to get the "snow" to fall and have within the actions of the diamond shape MC itself, I have some code to randomise the colour of each dyamically loaded shape.
However, only 2 of the particles ever get loaded a new colour.

How can I amend the code to ensure ALL of the particles of "snow" are randomized ?

Thanks in advance.