I'm not sure what normal procedures you've tried, but make sure that you don't
have Freeze panes turned on.
In xl2003 menus:
Click on Window on the top toolbar.
If you see "Unfreeze panes", then click that option.
(If you see "freeze panes", then I'm wrong and stop reading.)
Then try scrolling up.
(Maybe even some of the normal procedures will work now.)