Problem with the falling snow tutorial

I have created the movie clip correctly from the tutorial on this site,but everytime I try to watch it it keeps cmonig up with ‘script error,the script error is causing flash mx to run slow.Would you like to abort this script?’

Is there any particular reason why it is doing this?

How many snow particles are you using?

If you set your amount of snow particles to a high amount, it will crash your flash.

Im using the default amount on the tutorial…

Did you edit the code in any way from the tutorial?

I believe the tutorial has a downloadable finished file to compare your code with.