How do I Animate Scale value on a physics behavior

Hi everyone!

Er I've bumped into a weird (maybe not) problem.

I've made a Sprite with a Physics Behavior. All is cool, it falls and collides with a ground Solid object.

Now I want the Sprite to change Size as it rolls on the ground but as soon as I put a Sine behavior (to have it grow), my Sprite looses apparently its Physics Behavior (it doesn't fall, it just stays there on screen with it's size pulsing).

As soon as I remove the Sine (or any Scale animation), it falls again on the ground as expected...

Am I doing something wrong?

I want to have an animation of a snowball rolling (with Physics) and growing bigger as time passes.

Please help....

Thanks!!

Piotr

You need to scale the object with actions, without sine, and you got to do it not too fast so the collisions can update.