Set _xscale and y_scale direction?

1

I’ve got a movieclip that I want to scale when a button is clicked.

I’m using the tween class to make the scaling smooth. It works fine when I test the movie within flash, but when I preview it in a browser the movieclip scales in the wrong direction. That is it turns upside down and scales to negative x and y values.

twXscale = new Tween(holder, "_xscale", easing.Strong.easeOut, holder._xscale, 80, 1, true);

What’s wrong ? Can I set the direction of the scaling or something ?

Thank you.