Fast Moving MovieClip "tearing" Problem

Hi,
I am currently building a pretty straight forward ball game with collision physics. My problem is my resulting animations seem to “tear” when moving fast. Once they slow down the problem it goes away. Can someone point me toward how i can stop the tearing effect.

The game currently has an array of balls. An enter frame listener goes through the array check for impact and updates their position accordingly.

I have attached a sample swf and the actionscript below. The document class is BallGame.as and the individual ball class is Ball.as.

Any help with this issue is greatly appreciated.

John

ballgame.swf in html

BallGame.as

[URL=“http://www.jnuwebsites.com/help/Ball.as”]Ball.as