Regarding Blur Filter

Greetings!
What do I use to blur a sliding picture? I want it to blur gradually as the motion of the picture increases. I have BlurFilter on right now, within the btn function that evokes the picture motion, but it obviously just immediately blurs the picture upon btn activation and doesn’t do it gradually.

I understand that filters can not be tween’d with tween (except tween lite but I am not sure that is how I should do this).

I found something on http://www.flepstudio.org/forum/tutorials/582-blurfilter-movieclip-actionscript-3-0-a.html but can’t seem to adapt it to my code.

I can post the code if need be.

Thanks! O