AsusEEE ACPI

[A.Y.]

Hello guys!
I've AsusEEE 900 and freebsd-7 stable;
I have acpi_asus loaded and my Fn buttons works ok.
However, If few times kldunload and kldload acpi_asus.ko then only first 
Fn-stroke is handled (I've experimented on brightness),
after that I had hung once; and in few more tests show that Fn buttons 
ignored.
Could anyone look into it in free time?
Or maybe anyone could gave me some info, link, or else.

Anyway thanks!