PNG Smooth move

Hello,

I’m wondering how to make SMOOTH movement of some object that contains PNG file. My PNG object is about 100x100pxl size.

The problem is that when PNG moves in the scene it’s blinking. It doesn’t look smoothly.
I have tried different FPS and different speed of motion but can’t make smooth motion.

http://img388.imageshack.us/my.php?image=motiontestai4.swf

Thanx for all help.