Enabling "Auto scroolbars" for a form means, that the scroolbars will only be visible if it it required - i.e. when a control does not fit inside the form. Try creating a groupbox for example and placing it so that a part of the control does not fit inside the form. The scroolbars should appear.
If you need a scroolbar that is always visible, no matter what the form contains, yoou can use a VScroolBar or a HScroolBar Control.