SOS!. Why can't attaching to the disc volume on windows 2000 platform? help me.

hi all.

my english is very pool,please forgive.

I’m working on a file systems filter driver,I have a question: My
filter use the boot to load,
I reference sfilter(ifskit for xp sp1), But it does not work. my filter
can’t attaching to the disc volume, why?
That is to say, They have not attaching to C: ,D: …disc volume on
windows 2000 platform?. my filter not receive
IRP_MJ_SYSTEM_CONTROL.But my filter is normal on windows xp. why?. Does
sfilter have BUG?

I find after following, OS is Load " FatDiskRecognizer" in windows XP,
but there is not in windows 2000,why?

How should I solve this problem? Let my filter work normally on window
2000.

Looks forward to everybody’s help

BTW:
my platform:
C: window 2000(FAT32)
D: window 2000(FAT32)(boot disc,debug/test my filter)
E: window XP(FAT32)

I have solved this problem , thank you everybody.