Mouse problems booting & rebooting

[vdm.fbsd at virgilio.it]

I have a laptop with a touchpad which is seen by FreeBSD 5.4 as a ps/2 mouse.

I configured moused and xorg.conf where the mouse has protocol "Auto" and
device "/dev/sysmouse".
now,
1) if I turn ON the pc and boot the mouse works flawlessly as expected.
Specifically I mean, among other things, that double-hitting the pad an
application icon the application is selected and launched, hitting the pad
open a menu and select an item of it, etc..
2) if I reboot into FreeBSD without turning off the computer from either
win XP or Freebsd 5.4 itself, the mouse can only move around but it is unable
to launch anything by double-hitting the pad or even to open any menu by
hitting the pad.
It all goes as though when rebooting without turning off the pc something
"alien" is kept in the "memory" of the mousepad, in its wires and this disturbs
the consequent setting.

My question is:
Is there any way under freebsd 5.4 at boot time to completely reset the
mouse, to clear anything "alien" from it?

Ciao
Vittorio