Is there some reason you can't use the move command?
The reason is: I want to modify position and size of the frame at the same time.
Use move() and resize().
You can also change the geometricBounds of both the frame and the content.
Sorry, guys. Didn't found time to respond.
You're right, Harbs, and it's how my CS3 script is built.
I just forgot it when I started to write a new script for CS5.5.
I thought every older version moves the image with the frame, in opposition of "the new behavior of CS5.5" !!
In short, I apologize and thank you for your help.