Update ScrollPane Scrollbars

When I want to move a container inside a ScrollPane the Scrollbars do not get updated.
For example, when I want to show a part of the container that is normally not visible without scrolling by using container.x -= 100; the scrollbars do not update.

Basically I am looking for a way to scroll a Scrollbar with actionscript.

I have tried:
container.x -= 100;
panel.invalidate();
panel.refreshPane();
panel.update();

the container moves, but the Scrollbars remain the same… Anyone an idea what I could do?

Thanks