missing add. disp.adapter menu

I am using the ASUS GeForce4 MX440 VGA card running on
Windows XP Professional Edition SP1 with non-WHQL drivers
provided by ASUS.
When I access the "Advanced" menu in the "Settings" tab
while logged on as an Administrator, I can see 3
additional tabs that one of it is a tab with nVidia's
logo and the name of the monitor & adaper. The problem is
that I could not see that 3 menus when logged on as non-
Administrator, which means that I am not able to adjust
the brightness and so on.
I have approached ASUS regarding the matter and they said
according to their test, the menus will show in all
accounts.
I have reinstalled the drivers, but the problem persists.
Please assist if anyone knows a solution.