Scroll whell on FreeBSD 5.3 i386

[Michael Madden]

What is the secret to getting my scroll wheel working on FreeBSD 5.3?  If have
the following added to /etc/rc.conf:

moused_enable="YES"
moused_flags=""
moused_port="/dev/psm0"
moused_type="auto"

I've also got the mouse section of /etc/X11/xorg.conf setup as:

Section "InputDevice"
        Identifier  "Mouse1"
        Driver      "mouse"
        Option      "Protocol" "auto"
        Option      "Device" "/dev/sysmouse"
EndSection

The mouse works fine as a normal mouse (right click, left click, middle
click), but the scroll wheel doesn't scroll.

Thanks in advance,
Mike