Snow Tutorial: Can't stop

can anyone help me with the snow example provided on kirupa?

I followed the tut and even downloaded the sample. I can’t get the snow to stop falling after the first runthrough. Here’s a link

http://noesudz.com/yoyo/mushroom.html

I’ve tried removing frames, adding stop action, deleting from timeline. I have no clue.

I also lost the oscillation function in the process somehow.

any help would be great.

thanks
nzondor