Scrollpane Won't Scroll far enough

Hello all - I have a scrollpane and I have set it’s source to a Sprite:

_pane.source = spriteContainer;

Before hand, I added all of my labels and components to the container itself. The scrollpane works in that it will scroll up and down for me… the problem is that it won’t scroll down far enough - it cuts off half of the last textfield.

I have done a lot of searching and have tried adding a “.invalidate();” method… I’ve even tried resizing the sprite itself, but to no avail.

Any ideas on how to fix this?

Thanks,
AR