After the installation of VX Revolution Driver, my Windows XP(TM) went wrong. Keyboard Layout went fucking 106jp. I reinstalled keyboard driver but it didn't work. Finally I succeeded by editing registry which follows:
"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\i8042prt\Parameters"
I changed the registry value into kbd101.dll, not kbd101a.dll nor else. yareyare daze.