Scroll in subform only down, UP NOT possible (with mousewheel)

[Eddie Smit]

Hi all,

In our database we have a form with a subform.
If this subform contains some records, but they al 'fit' in this
subform one can scroll down with the mouse. But one CAN NOT SCROLL UP
with the mouse again.
If one wants to see the top records again in this subform you have to
use the vertical scroll bar (arrows)!!
(if the subform contains many records, so one can use the vertical
scroll bar) the mouse wheel is working down AND UP.

Does someone know this mousewheel scroll problem?
(access2000)

Thanks in advance, Eddie Smit.
Holland.