>>370
/etc/rc.conf に
moused_enable="YES"
と書いてもダメですか？

/etc/X11/XF86Config にはなんて書いてます？

Section "InputDevice"
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "Auto"
Option "Device" "/dev/sysmouse"
EndSection

Section "ServerLayout"
...
InputDevice "Mouse0" "CorePointer"
...
EndSection
でもダメですか？